Head First Physics

Errata for Head First Physics

Submit your own errata for this product.


The errata list is a list of errors and their corrections that were found after the product was released. If the error was corrected in a later version or reprint the date of the correction will be displayed in the column titled "Date Corrected".

The following errata were submitted by our customers and approved as valid errors by the author or editor.

Color Key: Serious Technical Mistake Minor Technical Mistake Language or formatting error Typo Question Note Update



Version Location Description Submitted By Date Submitted Date Corrected
Printed
Page 18
3rd paragraph of MEMO

Note from the Author or Editor:
The 4th paragraph of text on the MOMO on page 18 starts with: Could you draw up the plans and send them to factory This should read Could you draw up the plans and send them to the factory

jr.larsen  Aug 09, 2009 
Printed
Page 54
In 'Errors' box 1st paragraph

... reflects the uncertainly in the ... Should be ... reflects the uncertainty in the ...

Note from the Author or Editor:
The person who submitted it has described it exactly.

jr.larsen  Aug 09, 2009 
Printed
Page 66
Middle column, 2nd line from bottom.

A superscript has been missed. 6.87 x 1010 should be 6.87 x 10^10

Note from the Author or Editor:
For clarification where it says 1010 at the end of the second-last line in the middle column, the second 10 should be superscripted, like the occurrence earlier on the line.

jr.larsen  Aug 09, 2009 
Printed
Page 71
Thought cloud at top of page

Superscript missed. 6 x 10 - 5 should be 6 x 10^-5

Note from the Author or Editor:
In the thought bubble, there is the text 10 - 5 The spaces in between the 10 the - and the 5 need to be deleted The the -5 needs to be superscripted, as it is in the top line of the paragraph below the though bubble. NB: This error was introduced in production/final editing when the style of the conversations was changed by someone at O'Reilly. The text in the thought bubble was originally in a paragraph and was correct int he InDesign file I submitted. It's probably worth the while of someone at O'Reilly doing a search for minus signs that appear in the ComicSans MS font to see if this has happened anywhere else.

jr.larsen  Aug 09, 2009 
Printed
Page 77
Bottom right question

0.000001 is the same as ? Should be 0.00001 is the same as ? to fit with the answers on the next page and to avoid using 10^-6 as an answer twice.

Note from the Author or Editor:
The person who submitted this has described it clearly. One of the zeros in the number 0.000001 needs to be removed to make it 0.00001 (Introduced by me when fixing something else post tech review - sorry.)

jr.larsen  Aug 09, 2009 
Printed
Page 182
the top of page

"Sharpen your pencil" is wrong. It must be replaced ==> EXERCISE. ... and the picture, too.

Note from the Author or Editor:
The 'Sharpen your pencil Solution' graphic at the top left of page 182 should be replaced with an 'Exercise solution' graphic. The layout may need a small tweak to fit everything in, as the 'Exercise solution' graphic is taller but narrower than the 'Sharpen your pencil solution' graphic.

hyung-kyung hong  Apr 27, 2009 
Safari Books Online
196
Bubble at the bottom

Some letters are not displayed in the word "measure".

Note from the Author or Editor:
This is in the thought bubble at the bottom left of the page, 3rd line. There seems to have been a font mapping issue with the word 'measure'. The word should be bolded, as per the print book and PDF. In Safari it has been rendered bold-italic in a different font, and has some letters missing.

Thomas Corbière  Jan 30, 2013 
Printed
Page 220
2nd paragraph from bottom

... its easy to use a ruler ... should be ... it's easy to use a ruler ...

Note from the Author or Editor:
There needs to be an apostrophe where the person who submitted this says.

jr.larsen  Aug 12, 2009 
Printed
Page 236
Constant acceleration box

If something has a constant velocity... should be If something has a constant acceleration...

Note from the Author or Editor:
The person who submitted the error is correct and has described it clearly. (Legacy of me copying across a different post-it then forgetting to change a word - sorry.)

jr.larsen  Aug 12, 2009 
Printed
Page 241
second annotation paragraph in right side

You can tell that v and v0 are both displacement ~~ => not displacement but velocity.

Note from the Author or Editor:
The large annotation on the right hand side of the page says: ... are both displacements because they use the letter v. It should say: ... are both velocities because they use the letter v.

Hyung-Kyung Hong  May 14, 2009 
Printed
Page 243
Last paragraph, bottom of page

"However, as displacement is the rate of change of velocity..." Should be: "However, as velocity is the rate of change of displacement..."

Note from the Author or Editor:
In the first line of the second paragraph in the block of text at the bottom of the page, it says: "However, as displacement is rate of change of velocity" This should read "However, as velocity is rate of change of displacement"

Allen Roberts  Jun 20, 2009 
Printed
Page 254
Sharpen your solution

In Sharpen your pencil, I think the word "Solution" is missing

Note from the Author or Editor:
The 'Sharpen your pencil' graphic at the top of the page should be a 'Sharpen your pencil - Solution' graphic.

Hyung-Kyung Hong  May 14, 2009 
Printed
Page 271
3rd Paragraph

... but with some of the variable equal to zero ... should be ... but with some of the variables equal to zero ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 14, 2009 
Printed
Page 272
3rd Paragraph

... but with some of the variable equal to zero ... should be ... but with some of the variables equal to zero ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 14, 2009 
Printed
Page 273
Sharpen Your Pencil - bottom right

The time in the question is given to 2 sd. In the solution on the next page it has 3 sd.

Note from the Author or Editor:
Sharpen your pencil: Question, 1st line 1.5 should be 1.50

jr.larsen  Aug 14, 2009 
Printed
Page 279
Think like a physicist! 2nd paragraph

In a similar way to your forehand. you can also ... should be In a similar way to your forehand, you can also ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 14, 2009 
Printed
Page 284
Acme Cage Launcher graphic at bottom

The image of the cage in the graphic is garbled.

Note from the Author or Editor:
Agreed - this appears to have happened to a few images in the book (not drawn by the author). Possibly something going wrong with transparency somewhere?

jr.larsen  Aug 14, 2009 
Printed
Page 289
2nd main paragraph

"Vectors are vectors ..." Did you mean to say that? (And what's the guy in the picture holding?!)

Note from the Author or Editor:
Para 1, sentence 1 begins: Vectors are vectors, so as long as you are consistent This should be shortened to As long as you are consistent The rest of the sentence and paragraph remains the same. (Looking back through the earlier drafts, this was a bit of over-zealous editing that I missed when it got passed back to me!)

jr.larsen  Aug 14, 2009 
Printed
Page 294
Bottom left graph

Note from the Author or Editor:
Description is correct. (Graph was originally x-t graph... not all of the labels got changed when it became a v-t graph. I will learn from this.)

jr.larsen  Aug 14, 2009 
Printed
Page 303
right side

"Your launch velocity of 5.0 m/s is a definitely right!" But I think that launch velocity is not 5.0 m/s but 9.8 m/s.

Note from the Author or Editor:
In the heading at the bottom right of page 303, the number 5.0 should be changed to read 9.8 (the same as the number in the picture). (Originally requested pre-publication but it slipped through.)

hyung-kyung Hong  May 21, 2009 
Printed
Page 315
1st paragraph

... rocket-powered sled ... should be ... rocket-powered hovercraft ... ?

Note from the Author or Editor:
Yes - this is correct and clearly described. (due to a scenario change where one occurrence of the sled which became a hovercraft got missed... originally the Emu was sending a postcard from Antarctica.)

jr.larsen  Aug 14, 2009 
Printed
Page 318
1 paragraph after main title

As well as a stopping distance to pass onto the Dingo... sounds like you are putting the stopping distance on the Dingo's head. Should it be As well as a stopping distance to pass on to the Dingo... i.e. you will pass on the stopping distance to the Dingo?

Note from the Author or Editor:
1st paragraph after main title, 11st sentence: As well as a stopping distance to pass onto the Dingo, you now know should read You worked out a stopping distance for the Dingo - and now know

jr.larsen  Aug 14, 2009 
Printed
Page 318
Bottom left annotation

Second sentence should have capital I: ... just worked out. It's sometimes called ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 14, 2009 
Printed
Page 321
2nd paragraph

... the Dingo doesn't know what what his launch ... should be ... the Dingo doesn't know what his launch ...

Note from the Author or Editor:
Description is clear and correct. Additionally, the word 'Grand' should be removed from the heading at the top of page 321.

jr.larsen  Aug 14, 2009 
Printed
Page 322
Part a of the Sharpen your pencil solution

Shouldn't the arrow for acceleration should be double headed

Note from the Author or Editor:
In the sketch on the left hand side of the 'Sharpen your pencil solution' there is an arrow on the far left pointing downwards with a = -9.8 m/s2 next to it This arrow should be double-headed (like the arrows on p182 which have the word 'Acceleration' next to them).

Allen Roberts  Jun 20, 2009 
Printed
Page 340
Bottom right annotation

Dawr a little square... should be Draw a little square...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 14, 2009 
Printed
Page 345
Sharpen Your Pencil

(Also in solution on page 346) Lengths are given to 4sd in the question text. Should be 3sd to be consistent with previous examples and with working and annotations on page 346.

Note from the Author or Editor:
Sharpen your pencil, numbers in question 15.00 should be 15.0 25.00 should be 25.0

jr.larsen  Aug 14, 2009 
Printed
Page 346
Sharpen your pencil solution - Question text

15.00 should be 15.0 25.00 shoudl be 25.0

Heather Lang
Heather Lang
O'Reilly Author 
Nov 01, 2009 
Printed
Page 354
3rd Paragraph (indented)

The hypotenuse it labelled 'hypotenuse.' should be The hypotenuse is labelled 'hypotenuse.'

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 14, 2009 
Printed
Page 355
Bottom right annotation

The annotation overlays the 'you are here' footer text.

Note from the Author or Editor:
Bottom right of page - the annotation overlays the 'you are here' footer text. To fix, it's probably best to pull the left boundary of the annotation box out to the left, until the annotation is three lines instead of four. Then shift the annotation box to the right or left to get it to line up with the tail of the annotation arrow.

jr.larsen  Aug 14, 2009 
Printed
Page 360
Bottom right bold note

... inwhich ... should be ... in which ...

Note from the Author or Editor:
The 4th line of the sidebar at the bottom right of the page is missing a space int he phrase 'in which'.

jr.larsen  Aug 14, 2009 
Printed
Page 365
Kontext at bottom of page

Mismatched speech marks on "K'ontext. Same in solution on page 366

Note from the Author or Editor:
Description is clear. Both speech marks should be single quotes.

jr.larsen  Aug 14, 2009 
Printed
Page 367
Bottom paragraph

... if the cannonball doesn't deviate from its part all that much. should be ... if the cannonball doesn't deviate from its path all that much. (although can it deviate from its own path at all?)

Note from the Author or Editor:
Final paragraph contains the phrase: if the cannonball doesn't deviate from its part all that much. To work out if the angle's OK This should read if the cannonball doesn't deviate a lot from where you aimed it. To work out if things are OK

jr.larsen  Aug 14, 2009 
Printed
Page 370
Bottom right annotation

The vertical displacements should be equal to (1/2)at^2, rather than at^2.

Note from the Author or Editor:
Description is clear and correct. The easiest way of fixing this is to copy the (1/2) character from the annotation above and paste it in front of the at^2 at the end of the bottom line.

jr.larsen  Aug 15, 2009 
Printed
Page 371
4rd paragraph

It says:"The vertical components of both.....Gravity accelerates...changing the HORIZONTAL component of each object..." I think it should be "VERTICAL component". Am I right? Best reagards Alessandro

Note from the Author or Editor:
In the 4th paragraph on page 371 (which begins "The vertical components of both...") the 6th line should read "changing the vertical components of". (What is currently there is technically correct, but is not the point that the paragraph was written to make!)

Alessandro Boggiano  Apr 30, 2009 
Printed
Page 371
5th Paragraph

The horizontal component ... should be The horizontal components ...

Note from the Author or Editor:
Description is clear and correct. (Make sure the 's' is in bold when added to the cord 'component'.)

jr.larsen  Aug 15, 2009 
Printed
Page 389
sine, cosine and tangent box

In the diagram and in the last fraction ajd should be adj

Note from the Author or Editor:
Description is clear and correct. ('adj' is short for 'adjacent' so 'ajd' is a typo)

jr.larsen  Aug 15, 2009 
Printed
Page 400
1st paragraph

... the stone cannonball is only a third of the mass ... should be ... the stone cannonball is only a quarter of the mass ... to fit with inset graphic and future calculations.

Note from the Author or Editor:
The description is clear and correct. (The specifics problem changed between tech review and the final copy - I missed this occurrence.)

jr.larsen  Aug 15, 2009 
Printed
Page 400
Central thought bubble

... further then the iron one ... should be ... further than the iron one

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 15, 2009 
Printed
Page 401
1st paragraph

... it's a third of the mass ... should be ... it's a quarter of the mass ...

jr.larsen  Aug 15, 2009 
Printed
Page 407
Brain Power - bottom right

... velocity for a stone cannonballs ... should be ... velocity for a stone cannonball ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 15, 2009 
Printed
Page 410
4th paragraph

... changing and measuring the vehicles masses ... should be ... changing and measuring the vehicles' masses ...

Note from the Author or Editor:
Paragraph is the first one on the right hand side of the page, typo is in 1st line. Description is clear and correct. (Careful with how the text wraps - adding the apostrophe may slip vehicles' onto the next line, so the textbox may need to be enlarged slightly if this causes words to flow out at the bottom.)

jr.larsen  Aug 15, 2009 
Printed
Page 426
Last paragraph - bottom right

... conseervation ... should be ... conservation ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 15, 2009 
Printed
Page 428
right hand annotation

Repeated comma after m(sub)i

Note from the Author or Editor:
Right hand annotation: ,, should be ,

jr.larsen  Aug 15, 2009 
Printed
Page 429
3rd Paragraph

... the cannonballs' range if you know its velocity ... should be ... the cannonball's range if you know its velocity ... or ... the cannonballs' range if you know their velocity ...

Note from the Author or Editor:
3rd para on page (1st under the heading "... but you want the new range!" 2nd line, 1st word cannonballs' should be cannonball's

jr.larsen  Aug 15, 2009 
Printed
Page 433
2nd to last paragraph

... the horizontal component of the iron cannonballs' velocity. should be ... the horizontal component of the iron cannonball's velocity.

Note from the Author or Editor:
2nd paragraph under the heading 'You solved the pirates' problem!' 2nd line ends with: cannonballs' this should read: cannonball's

jr.larsen  Aug 15, 2009 
Printed
Page 443
1st paragraph

... in physics we need use these words more carefully. should be ... in physics we need to use these words more carefully.

Note from the Author or Editor:
Clear description already given.

jr.larsen  Aug 15, 2009 
Printed
Page 447
6th paragraph on right

F(sub)net = ma its the most ... should be f(sub)net = ma is the most ...

Note from the Author or Editor:
Description is slightly incorrect, as the F needs to remain capitalised. The change that actually needs to be made: its the most useful form should be is the most useful form

jr.larsen  Aug 15, 2009 
Printed
Page 458
Last paragraph

... the perpendicular force you are exert on it ... should be ... the perpendicular force you exert on it ...

Note from the Author or Editor:
Paragraph at the bottom of the page, 2nd line ... the perpendicular force you are exert on it ... should be ... the perpendicular force you exert on it ...

jr.larsen  Aug 15, 2009 
Printed
Page 461
1st paragraph in right column

Fnet should be F(sub)net

Note from the Author or Editor:
Right hand column, 1st para. The equation at the end of the 3rd line reads: Fnet = ma 'net' should be subscript 'F' should be bold 'a' should be bold 'm' should be italic

jr.larsen  Aug 15, 2009 
Printed
Page 463
1st paragraph

"Perpendicular component" is in bold apart from the t.

Note from the Author or Editor:
2nd line of 1st paragraph. The whole of the word 'component' should be in bold.

jr.larsen  Aug 15, 2009 
Printed
Page 482
Part b of the Sharpen your pencil solution

The calculation of cos(22.4) = a/h = P(sub)2u/d / 365 should be: P(sub)2l/r / 365

Note from the Author or Editor:
Part b of the 'Sharpen your pencil solution', next to the lower triangle, there is an equation that begins cos(22.4). In the top line of that equation, in the rightmost term, it says p2u/d where the '2u/d' is subscripted. Instead, the subscript should read '2l/r' like the subscript at the beginning of the line below.

Allen Roberts  Jun 20, 2009 
Printed
Page 484
4th paragraph, 2nd sentence

Does the sentence make sense? "If no other horizontal forces are present, and therefore no friction if there are no other horizontal forces."

Note from the Author or Editor:
For greater clarity, the paragraphs at the bottom right beginning "If the object is stationary..." and "If you start to gently push..." should be completely replaced by the following two paragraphs: If an object is stationary, its velocity is constant (and zero!). Constant velocity means that no net force acts on the object. If there are no horizontal forces acting on the object, the frictional force acting on the object must also be zero. If you start to gently push a stationary object, it won’t move, as friction always opposes motion. But if you keep on pushing harder, you’ll eventually manage to exert a larger horizontal force than the maximum possible frictional force, and the object will move. IMPORTANT NOTE: This increases the length of the 1st para in the textbox by a line. In order to stop the text flowing out of the textbox, you will need to pull the bottom of the textbox down to accommodate the final line of text. (This section got badly mangled by an editor who tried to rewrite the original text without checking what it was supposed to mean.)

jr.larsen  Aug 16, 2009 
Printed
Page 493
Last paragraph - left column

... force actually is is in real life. should be ... force actually is in real life.

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 16, 2009 
Printed
Page 495
d. in 'Sharpen your pencil'

In the third line of section d. the variable F(sub)fric is mentioned. This should be changed to F(sub)r with the same formatting (bold and subscript) as the variable that is already there.

Note from the Author or Editor:
In the third line of section d. the variable F(sub)fric is mentioned. This should be changed to F(sub)r with the same formatting (bold and subscript) as the variable that is already there.

Heather Lang
Heather Lang
O'Reilly Author 
May 04, 2009 
Printed
Page 496
d. in Sharpen your pencil - Solution

n the third line of the question in section d. the variable F(sub)fric is mentioned. This should be changed to F(sub)r with the same formatting (bold and subscript) as the variable that is already there.

Note from the Author or Editor:
In the third line of the question in section d. the variable F(sub)fric is mentioned. This should be changed to F(sub)r with the same formatting (bold and subscript) as the variable that is already there.

Heather Lang
Heather Lang
O'Reilly Author 
May 04, 2009 
Printed
Page 496
Top left diagram

Should Friction force F(sub)f be Friction force F(sub)fric ?

Note from the Author or Editor:
Labelled diagram which is the answer to part a. (top left). The arrow pointing left has a label under it: Friction force Ff where the 'f' in Ff is subscript The label should be changed to: Friction force Ffric where the 'fric' in Ffric is subscript. (It may be necessary to increase the size of the textbox to do this.)

jr.larsen  Aug 16, 2009 
Printed
Page 499
Bottom left annotation

... so that the net force in the direction is zero ... should be ... so that the net force in that direction is zero ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 16, 2009 
Printed
Page 503
line 5, second sentence

"Look back at pages $$-$$..." Replace "$$-$$" with a page number. Same error on page 504

Note from the Author or Editor:
On page 503 in the 3rd para of the 'Sharpen your pencil', it says: pages $$-$$ of chapter 10 This should instead read: pages 397-398 of chapter 10 On page 504 in the 3rd para of the 'Sharpen your pencil solution', it says: pages $$-$$ of chapter 10 This should instead read: pages 397-398 of chapter 10 ($$ was used as a placeholder string for page numbers before the chapters of the book were stitched together. Unfortunately, these occurrences weren't replaced.)

Allen Roberts  Jun 22, 2009 
Printed
Page 507
Section e question

... the players weight less. should be ... the players weigh less.

Note from the Author or Editor:
In section e. of the sharpen ... the players weight less. should be ... the players weigh less.

jr.larsen  Aug 16, 2009 
Printed
Page 508
Section e question

... the players weight less. should be ... the players weigh less.

Note from the Author or Editor:
In section e. of the sharpen solution: ... the players weight less. should be ... the players weigh less.

jr.larsen  Aug 16, 2009 
Printed
Page 510
Section a, last answer

You say if the force required is smaller than can be provided by friction a slip will occur. Is it not if the force required is bigger?

Note from the Author or Editor:
3rd para in solution to part a. direction is smaller than should be direction is larger than

jr.larsen  Aug 16, 2009 
Printed
Page 510
Bottom title

You can change only direction horizontally ... should be You can only change direction horizontally ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 16, 2009 
Printed
Page 521
2nd paragraph

"The rules say only one attempt per lifetime!" But the rules on page 516 say "Only two attempts per person in a lifetime."

Note from the Author or Editor:
Page 521, 2nd para, 2nd line one attempt should be two attempts

jr.larsen  Aug 16, 2009 
Printed
Page 527
Bottom left annotation

Should the annotation be pointing to the sketch above the Sharpen your pencil box?

Note from the Author or Editor:
The bottom-left annotation needs a new arrow, pointing from it to the sketch immediately above the 'Sharpen your Pencil' box. (There should be room for the arrow to fit behind the smaller arrow that is already attached to the annotation, up and over the end of the pencil, then right.)

jr.larsen  Aug 16, 2009 
Printed
Page 531
Sharpen - 1st part

The first part of the sharpen currently reads: A lever, length L, has two masses on it. At one end is a sword and stone, mass m1 and displacement r1 from the fulcrum. At the other end of the lever is a stack of stones, mass m2 and displacement r2 from the fulcrum. Basically, the correction is to swap the positions of the "sword and stone", and the "stack of stones", in the text. The formatting (bold, italic, subscript etc.) needs to stay the same, so the correction shouldn't be made by copying and pasting from this website, but the words need to be swapped so that it reads: A lever, length L, has two masses on it. At one end is a stack of stones, mass m1 and displacement r1 from the fulcrum. At the other end of the lever is a sword and stone, mass m2 and displacement r2 from the fulcrum.

Heather Lang
Heather Lang
O'Reilly Author 
Nov 01, 2009 
Printed
Page 532
Final answer

Answer is given to 2 sd but says 3 sd in brackets.

Note from the Author or Editor:
Bottom right of page, handwritten answer to part d, final line (3 sd) should be (2 sd)

jr.larsen  Aug 16, 2009 
Printed
Page 532
Whole answer

The r1 and r2 in the answer do not correspond with the r1 and r2 in the question. Either swap the r1 and r2 in the question (also on pages 531 and 533) or rewrite the answer.

Note from the Author or Editor:
The first part of the sharpen currently reads: A lever, length L, has two masses on it. At one end is a sword and stone, mass m 1 and displacement r1 from the fulcrum. At the other end of the lever is a stack of stones, mass m2 and displacement r2 from the fulcrum. Basically, the correction is to swap the positions of the "sword and stone", and the "stack of stones", in the text. The formatting (bold, italic, subscript etc.) needs to stay the same, so the correction shouldn't be made by copying and pasting from this website, but the words need to be swapped so that it reads: A lever, length L, has two masses on it. At one end is a stack of stones, mass m1 and displacement r1 from the fulcrum. At the other end of the lever is a sword and stone, mass m2 and displacement r2 from the fulcrum.

jr.larsen  Aug 16, 2009 
Printed
Page 533
Bold text in question clinic question

The first part of the question clinic text (the bold part) currently reads: A lever, length L, has two masses on it. At one end is a sword and stone, mass m1 and displacement r1 from the fulcrum. At the other end of the lever is a stack of stones, mass m2 and displacement r2 from the fulcrum. Basically, the correction is to swap the positions of the "sword and stone", and the "stack of stones", in the text. The formatting (bold, italic, subscript etc.) needs to stay the same, so the correction shouldn't be made by copying and pasting from this website, but the words need to be swapped so that it reads: A lever, length L, has two masses on it. At one end is a stack of stones, mass m1 and displacement r1 from the fulcrum. At the other end of the lever is a sword and stone, mass m2 and displacement r2 from the fulcrum. NOTE: Linebreak between 1st and 2nd lines should occur like this: stack of stones As 'stones' is one letter longer than what was previously on the 2nd line, you will have to move the hand-drawn underlines and arrows under m1, r1 and fulcrum on the 2nd line.

Heather Lang
Heather Lang
O'Reilly Author 
Nov 01, 2009 
Printed
Page 537
Whole page

The distance 0.10 m is shown sometimes as 0.10 and sometimes as 0.100

Note from the Author or Editor:
2nd para, 1st line: 0.10 m (10 cm) should be 0.100 m (10.0 cm) Looking down the left hand side of the page, the 2nd annotation: The 150 kg of stacking stones need to go down by 1.00 m to lift the sword and stone 0.10 m Should be The 150 kg of stackable stones need to go down by 1.00 m to lift the sword and stone 0.100 m At the bottom right of each diagram 0.10 m should be 0.100 m (Note: You may need to increase the sizes of some of the textboxes to avoid the text from flowing out.)

jr.larsen  Aug 16, 2009 
Printed
Page 538
4th paragraph

... parallel to other force ... should be ... parallel to the other force ...

Note from the Author or Editor:
Description is clear and correct. (Paragraph is 4th on page and 2nd one under the heading that beings "The work you need to do a job".)

jr.larsen  Aug 17, 2009 
Printed
Page 538
6th paragraph

The work you do on the object is defined as the he parallel ... should be The work you do on the object is defined as the parallel ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 17, 2009 
Printed
Page 539
Whole page

Inconsistent precision for distances. Some 0.10m and some 0.100m

Note from the Author or Editor:
Both versions of the pictures, at the bottom right of each picture 0.10 m should be 0.100 m (Text boxes may need to be enlarged to fit in the extra digit.)

jr.larsen  Aug 17, 2009 
Printed
Page 546
Sharpen your pencil

In the question (1st line): 0.10 should be 0.100 In the hand-written solution (2nd line of solution to part a.) 0.10 should be 0.100

Heather Lang
Heather Lang
O'Reilly Author 
Nov 01, 2009 
Printed
Page 551
2nd paragraph

... is a bit like like jiggling ... should be ... is a bit like jiggling ...

Note from the Author or Editor:
Description given is clear and correct.

jr.larsen  Aug 17, 2009 
Printed
Page 563
Brain Power - bottom right

Last line: the the first and second checkpoints? should be the first and second checkpoints?

jr.larsen  Aug 17, 2009 
Printed
Page 565
Sharpen Your Pencil - end of 2nd paragraph

appendix $ needs to be specified.

Note from the Author or Editor:
Just before question b. there is a block of text that ends with the words: look them up in appendix $. This should be look them up in appendix ii.

jr.larsen  Aug 17, 2009 
Printed
Page 566
Sharpen Your Pencil Solution

appendix $ needs to be specified.

Note from the Author or Editor:
Just before question b. there is a block of text that ends with the words: look them up in appendix $. This should be look them up in appendix ii.

jr.larsen  Aug 17, 2009 
Printed
Page 574
2nd to last paragraph

K = 1/2mv2 needs a superscript.

Note from the Author or Editor:
1st para under the heading "Doing work against friction increases the internal energy", last line The line ends with an equation, which is completely unformatted. The easiest way to fix this is to copy the same equation from another place: the beginning o the third line in the second-last paragraph on page 570, where the italic, bold and superscript formatting are all correct.

jr.larsen  Aug 17, 2009 
Printed
Page 577
Section d

... the minimum time it would take a 10.0 kW engine time to lift ... should be ... the minimum time it would take a 10.0 kW engine to lift ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 17, 2009 
Printed
Page 578
Section d

... the minimum time it would take a 10.0 kW engine time to lift ... should be ... the minimum time it would take a 10.0 kW engine to lift ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 17, 2009 
Printed
Page 582
Last paragraph of solution

30 x 30 cm = 900 cm = 9 meters ... should be 35 x 30 cm = 1050 cm = 10.5 meters ...

Note from the Author or Editor:
Description submitted is correct and clear. (The specs of the problem changed, but the answer didn't get changed everywhere it should have.)

jr.larsen  Aug 17, 2009 
Printed
Page 582
Exercises solution, task a.

(ii) the kinetic v-multiplier has a wrong value (38.5²m/s), although its v=35.8²m/s, thus also false result(107 J). result must be 92.92J.

Note from the Author or Editor:
In the 'Exercise solution' box, a few things need to be changed: Exercise a. (ii) in the skippy sharp handwritten font, left hand side of box: 1st line of solution, towards the end: 38.5 should be 35.8 (the superscript '2' for 'squared' is correct and should remain in place) 2nd line of solution: K = 107 J (3sd) should be K = 92.9 J (3sd) This change also affects the answer to part c. at the bottom of the Exercise Solution box: 1st line of solution to part c. "around 35 times more kinetic energy" should be "around 40 times more kinetic energy" 3rd line of solution to part c. "do 35 times more work" should be "do 40 times more work" 5th line of solution to part c. "displacement of 30 x 30 cm = 900 cm = 9 meters" should be "displacement of 40 x 30 cm = 1200 cm = 12 meters"

Anonymous  Mar 26, 2010 
Printed
Page 585
Bottom thought cloud

2nd sentence should start with a capital.

Note from the Author or Editor:
Bottom thought bubble, second line if the question should read If the question

jr.larsen  Aug 17, 2009 
Printed
Page 588
4th paragraph from bottom

if the change ... should be If the change ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 17, 2009 
Printed
Page 604
Title

It's a bird... it's plane... should be It's a bird... it's a plane... (unless it's a joke!)

Note from the Author or Editor:
Description is clear and correct. (Not a joke, though cheese references in a later chapter are all deliberate.)

jr.larsen  Aug 17, 2009 
Printed
Page 606
Sharpen Your Pencil Solution - First equation

The subscript for a, the acceleration, is before it. It should be after it.

Note from the Author or Editor:
Hand-written solution, right hand side, second line, last thing in line. The letters after the half should be, in order: avt2 with the v subscript and the 2 superscript.

jr.larsen  Aug 17, 2009 
Printed
Page 616
1st paragraph

All we need to do it to put ... should be All we need to do is to put ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 17, 2009 
Printed
Page 618
Part b of the Sharpen your pencil solution

In the final answer: a = 4.54 m/s (3 should be: a = 4.54 m/3 (3 sd)

Note from the Author or Editor:
In the answer to part b of the sharpen, the final line reads: a = 4.53 m/s (3 This should read a = 4.54 m/s2 (3sd) with a superscripted 2 (It looks like the sd) has run out of the textbox, but the superscipt 2 still needs to be added once the textbox has been extended.)

Allen Roberts  Jun 20, 2009 
Printed
Page 620
Sharpen Your Pencil Solution - 2nd line from bottom

F(sub)net = T - F(sub)|| + F(sub)fric should be F(sub)net = T - F(sub)|| - F(sub)fric or F(sub)net = T - ( F(sub)|| + F(sub)fric )

Note from the Author or Editor:
Answer to part c, 4th line, equation at start of line. There are some parentheses missing. In the explanation below, [sub] refers to a subscript. The parentheses that should be inserted are rounded ones, shown like this ( or this ). The parentheses to be inserted should be full size, not subscripted. F[sub]net = T - F[sub]|| + F[sub]fric should be F[sub]net = T - ( F[sub]|| + F[sub]fric ) NOTE: The word wrap looks pretty tight in this textbox - it may be necessary to extend the box slightly to the right to avoid words flowing out of the box.

jr.larsen  Aug 17, 2009 
Printed
Page 625
Right hand annotation

This is larger then the ... should be This is larger than the ...

Note from the Author or Editor:
This is correctly and clearly described.

jr.larsen  Aug 17, 2009 
Printed
Page 638
Left column about half way down

The Answer that begins,

Note from the Author or Editor:
The third answer in the left hand column of the 'no dumb questions' element starts with the text: Yes, that's be fine This should instead read: Yes, that's fine.

Allen Roberts  Jul 31, 2009 
Printed
Page 657
Left side of page just past half way down

In the large bold print: "Multiply the linear quantity..." should be "Divide the linear quantity..."

Note from the Author or Editor:
On p657, the large text in Woodrow font on the left hand side says: "Multiply the linear quantity by the radius to get the equivalent angular quantity." This should read: "Multiply the angular quantity by the radius to get the equivalent linear quantity."

Allen Roberts  Jun 20, 2009 
Printed
Page 657
Annotation on left

Here, we're written v ... should be Here, we've written v ...

Note from the Author or Editor:
Description given is correct. Position of annotation is left of page, nearly halfway down.

jr.larsen  Aug 18, 2009 
Printed
Page 678
last second answer in dump questions

Note from the Author or Editor:
The second last answer in the no dumb questions element reads: Great spot! You'll be learning all about that in chapter 16. This should instead read: Great spot! You'll be learning all about that in chapter 18. (The error was made as a result of a couple of earlier chapters splitting into two.)

hyung-kyung hong  Jul 09, 2009 
Printed
Page 682
Bottom right question

Isn't acceleration is usually a vector? should be Isn't acceleration usually a vector? and ... a scalar equation gives the ... should be ... a scalar equation that gives the ...

Note from the Author or Editor:
Isn't acceleration is usually a vector? should be Isn't acceleration usually a vector? And a scalar equation gives the should be a scalar equation giving the

jr.larsen  Aug 18, 2009 
Printed
Page 683
Last question

... he travel AT if he'd been in (i) 10.0m radius module and (ii) the 100m radius modules? should be ... he travel at if he'd been in (i) the 10.0m radius module and (ii) the 100m radius module?

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 18, 2009 
Printed
Page 684
Solution section b

... he travel AT if he'd been in (i) 10.0m radius module and (ii) the 100m radius modules? should be ... he travel at if he'd been in (i) the 10.0m radius module and (ii) the 100m radius module?

Note from the Author or Editor:
Description is clear and correct. (Not sure what's happened here - the 'at' was missed out originally, reported as a typo, but whoever changed it lent on their caps lock key!)

jr.larsen  Aug 18, 2009 
Printed
Page 687
Question 1

In terms of the circle's radius: In terms of r: should be In terms of the circle's radius, r: (and that's a funny rectangle!)

Note from the Author or Editor:
In the 'sharoen your pencil', the final sentence before the a. b. c. part says: In terms of the circle's radius: In terms of r: These two statements need to be put together to make one sentence: In terms of the circle's radius, r: (where the r is in italics) In terms of layout, this 'gains' a couple of lines that can be used to give the learner more space to work out their answer below the question. Pulling the text box frame to the right so that the third line starts with 'a rectangle' and ends with 'radius, r:' looks like the best way of doing this.

jr.larsen  Aug 18, 2009 
Printed
Page 688
Question 1

In the 'sharpen your pencil solution', the final sentence in question 1, at the top of the page, before the a. b. c. part says: In terms of the circle's radius: In terms of r: These two statements need to be put together to make one sentence: In terms of the circle's radius, r: (where the r is in italics) In terms of layout, this 'gains' a couple of lines that can be used to give the learner more space to work out their answer below the question. Pulling the text box frame to the right so that the third line starts with 'a rectangle' and ends with 'radius, r:' looks like the best way of doing this.

Heather Lang
Heather Lang
O'Reilly Author 
Aug 19, 2009 
Printed
Page 708
Top question, middle column

Last sentence: ... a circle with radius t. should be ... a circle with radius r.

Note from the Author or Editor:
Final sentence of 3rd answer (which is about halfway down the middle column). a circle with radius t. should be a circle with radius r. (with the r in italics)

jr.larsen  Aug 20, 2009 
Printed
Page 709
Section b

... when it enters bottom of the loop ... should be ... when it enters the bottom of the loop ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 20, 2009 
Printed
Page 710
Section b question

... when it enters bottom of the loop ... should be ... when it enters the bottom of the loop ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 20, 2009 
Printed
Page 710
Section c annotation

... atthe start of the track. should be ... at the start of the track.

Note from the Author or Editor:
Grey skippy sharp annotation 3/4 of the way down on left hand side, 3rd line, first words atthe should be at the

jr.larsen  Aug 20, 2009 
Printed
Page 718
Paragraph above diagram

... a bunch of little spikes s should be ... a bunch of little spikes.

Note from the Author or Editor:
Description is correct and clear. It's the sentence above the picture of the circle with spikes.

jr.larsen  Aug 20, 2009 
Printed
Page 722
Section b answer

Thereforce r^2 must be ... should be Therefore r^2 must be ...

Note from the Author or Editor:
3rd line of section b. answer. Description is clear and correct. (I must have typed 'force' so many times by that point that my fingers were on autopilot!)

jr.larsen  Aug 20, 2009 
Printed
Page 728
Part a of the Sharpen your pencil solution

I don't understand how v(sub)0 comes out to be 3x10^13 Isn't V(sub)0^2 in the neighborhood of 20 x 6x10^12 or roughly 1.2x 10^14? Wouldn't the square root of that be around 10^7 ? Or looking at it another way if v(sub)0 is really 3x10^13 then wouldn't V(sub)0^2 be 9x10^26 ? This doesn't agree with the order of magnitude of 10^14 for V(sub)0^2 in the solution.

Note from the Author or Editor:
On p728 in the 'Sharpen your pencil solution' part a. the final answer (double underlined) is given as 3 x 1013 m/s (1sd) (with a superscripted 13). Unfortunately this one slipped through. The answer is incorrect, and it affects the answer to part b as well. So... The double underlined part of the answer to a. reads 3 x 1013 m/s (1sd) (where the 13 is superscripted) It should read 1 x 107 m/s (1sd) (where the 7 is superscripted) (Note that the x is a times sign, not the letter x) The current answer to part b. should be deleted and replaced with: This is very fast. It’s getting close to the speed of light (the largest speed a material body can have). There’s no way you can build up that kind of speed so rapidly. (You'll need to increase the width of the textbox to around 245pt to make that text fit. There's room for it if you drag its rightmost margin out.)

Allen Roberts  Jun 20, 2009 
Printed
Page 730
Last paragraph, bottom of page

"The same amount of light it..." should be "The same amount of light is..."

Note from the Author or Editor:
In the third para in the block of text on the left hand side of p730, it says: "The same amount of light it spread out" This should read "The same amount of light is spread out"

Allen Roberts  Jun 22, 2009 
Printed
Page 731
Bottom right annotation

... interested in the distance, buit sometimes ... should be ... interested in the distance, but sometimes ...

Note from the Author or Editor:
Bottom right annotation 4th line buit should be but

jr.larsen  Aug 20, 2009 
Printed
Page 734
Left margin annotation

Says look back at page 718 722?

Note from the Author or Editor:
Page reference in the annotation on the left should be 722 (not 718). (Pagination was changed some time between the 'Quality Control 1' version I was sent for checking and to fill in what my wildcard page numbers should be, and the final printed book. The numbers are correct in my copy, but some extra pages must have been inserted in the final copy.)

jr.larsen  Aug 20, 2009 
Printed
Page 735
The text below the figure of the earth

The 4ht line of the text "r(sub)2 than it is at... should be "r(sub)3 than it is at..."

Note from the Author or Editor:
To the bottom right of the picture of the earth, there's a four line block of Skippy Sharp font text. The 4th (and final) line of that text block begins r2 where the 2 is subscripted Instead it should begin r3 where the 3 is subscripted.

Allen Roberts  Jun 22, 2009 
Printed
Page 735
Annotation on left

Thje length of r(sub)2 ... should be The length of r(sub)2 ...

Note from the Author or Editor:
The annotation is the one to the left of the globe picture. Description is clear and correct.

jr.larsen  Aug 20, 2009 
Printed
Page 738
Part a of the Sharpen your pencil solution

Use of m(sub)1 and m(sub)2 is not consistent In the equation: m(sub)1 = 5.97x10^24 kg should't it be m(sub)2 = 5.97x10^24 kg Also, just below the small circle the eqn: m(sub)2 should be m(sub)1

Note from the Author or Editor:
In the Sharpen your pencil solution, part a, there is a picture to the right which is annotated m1 = 5.97 × 1024 kg (the 1 of m1 is subscript, the 24 is superscript) m2 = ? (the 2 is subscript) The subscripts 1 and 2 are the wrong way round - the annotations should read: m2 = 5.97 × 1024 kg (the 2 of m2 is subscript, the 24 is superscript) m1 = ? (the 1 is subscript) (The textboxes stay in exactly the same place, only the subscripts get swapped.)

Allen Roberts  Jun 22, 2009 
Printed
Page 742
Bottom left annotation

... your velocity would be it you fell ... should be ... your velocity would be if you fell ...

Note from the Author or Editor:
Description is clear and correct.

jr.larsen  Aug 22, 2009 
Printed
Page 748
Right side, middle of page

In the 5th line of the paragraph starting with "It's OK if you..." are the words " calculated on page $$..." Should the two dollar signs have been a page number?

Note from the Author or Editor:
Second Skippy Sharp font annotation on right of page, 5th line down. Currently reads calculated on page $$, but Should read calculated on page 744, but

Allen Roberts  Jun 25, 2009 
Printed
Page 750
Answer at bottom of page

4.37 x 10^4 m/s = 44.7 km/s should be 4.37 x 10^4 m/s = 43.7 km/s

Note from the Author or Editor:
Description is clear and correct (the final 44.7 should be a 43.7).

jr.larsen  Aug 22, 2009 
Printed
Page 756
Text in left margin

In the 3rd line of the text "saatellite's" should be "satellites"

Note from the Author or Editor:
Skippy sharp not on left of page saatellite's should be satellite's (original description of error not quite correct as apostrophe should be retained)

Allen Roberts  Aug 26, 2009 
Printed
Page 757
First Q

The cube root symbol is missing.

Note from the Author or Editor:
1st question in left hand column What was that thing all about (with extra spaces between 'that' and 'thing') In my final InDesign file, the cube root symbol was where the spaces are. However, I had to use the 'apple symbols' font to get the cube root symbol as it doesn't exist in Arial Narrow. It looks like production probably cleared overrides on the style, which turned the character into Arial Narrow, effectively making the cube root symbol disappear. To fix this, selecting the 'spaces' between 'that' and 'thing' then changing the font to 'Apple Symbols' should work. It might also be worth searching the entire book for cube root symbols to see if this has happened anywhere else.

jr.larsen  Aug 22, 2009 
Printed
Page 757
3rd Q

The cube root symbol is missing for r = (cube root)something

Note from the Author or Editor:
3rd question in left hand column In the 2nd line of the question it says r = something (with extra spaces between the = and the something) In my final InDesign file, the cube root symbol was there. However, I had to use the 'apple symbols' font to get the cube root symbol as it doesn't exist in Arial Narrow. It looks like production probably cleared overrides on the style, which turned the character into Arial Narrow, effectively making the cube root symbol disappear. To fix this, selecting the 'spaces' between the '=' and the 'something' and changing the font to 'Apple Symbols' should work. It might also be worth searching the entire book for cube root symbols to see if this has happened anywhere else.

jr.larsen  Aug 22, 2009 
Printed
Page 757
2nd to last paragraph

And the astronaut it good to go. should be And the astronaut is good to go.

Note from the Author or Editor:
Under the bottom right heading, 2nd para And the astronaut it good to go. should be And the astronaut is good to go.

jr.larsen  Aug 22, 2009 
Printed
Page 757
Bottom of page, 4th line from the bottom

Should the geostationary orbits be 40000 km above the earth rather than 4000Km?

Note from the Author or Editor:
Bottom section, below Markerfelt font heading, 1st para 2nd line There's a value that reads 4000 km This should read 40000 km

Allen Roberts  Jun 25, 2009 
Printed
Page 768
Section b answer

The player viewing the duck from a side view. should be The player's viewing the duck from a side view.

Note from the Author or Editor:
Description is correct and clear.

jr.larsen  Aug 23, 2009 
Printed
Page 780
Top right annotation

This is our graph from page 768. should be This is our graph from page 772.

Note from the Author or Editor:
Description is clear and correct. (Pagination was changed some time between the 'Quality Control 1' version I was sent for checking and to fill in what my wildcard page numbers should be, and the final printed book. The numbers are correct in my copy, but some extra pages must have been inserted in the final copy.)

jr.larsen  Aug 23, 2009 
Printed
Page 789
Bottom left annotation

last line: ... some into it somewhere. should be ... come into it somewhere.

Note from the Author or Editor:
Description is correct and clear.

jr.larsen  Aug 23, 2009 
Printed
Page 791
Bottom left annotation

Should ... we worked out the equation for r earlier ... be ... we worked out the equation for v earlier ... ?

Note from the Author or Editor:
Description is clear and correct

jr.larsen  Aug 23, 2009 
Printed
Page 796
Lower right in the Cosine graph box

In the top half of the Cosine graph box should the equation x = A sin (theta) be x = A cos (theta)

Note from the Author or Editor:
Bottom right post-it with the title Cosine graph. Top graph. There is a label at the top right that says: x = Asin(theta) (where theta is the Greek letter theta) This should instead read: x = Acos(theta) (All that needs to be done is for the letters 'sin' to be replaced by the letters 'cos'; I think this equation is all inline and shouldn't need its textbox tweaked.)

Allen Roberts  Jul 31, 2009 
Printed
Page 801
Just beneath the large print Hooks Law formula

Second line of text block ... the spring exerts in in ... should be ... the spring exerts is in ...

Note from the Author or Editor:
Skippy sharp text on middle right of page, above the Sharpen bos. exerts in in the should be exerts is in the

Allen Roberts  Aug 26, 2009 
Printed
Page 802
The Sharpen Your Pencil Solution Box

In the answer of part c, 3rd line, first word: "Onvce" should be "Once"

Note from the Author or Editor:
Submitted description is clear and correct.

Allen Roberts  Aug 26, 2009 
Printed
Page 804
Bottom graph

Bottom graph, right side comment, second line: "dislacement should be "displacement"

Note from the Author or Editor:
Black skippy sharp text to right of lower diagram Acceleration at maximum when dislacement is at maximum should be Acceleration at maximum when displacement is at maximum

Allen Roberts  Aug 26, 2009 
Printed
Page 808
3rd paragraph

Should the text

Note from the Author or Editor:
The third paragraph on page 808 contains two typing errors that were late additions after tech review and entirely my fault! The inline equations that the words are supposed describe are correct. 1st error, text currently says: However, acceleration is rate of change of displacement This should instead say: However, acceleration is rate of change of velocity 2nd error, text currently says: But as displacement is rate of change of velocity This should instead say: But as velocity is rate of change of displacement

Allen Roberts  Jul 31, 2009 
Printed
Page 825
Text in margin of page

Text is: "Hint: Look back at page 807 for the equation for the force of a spring" I'm not sure page 807 has the Hook's Law equation. Suggest the reference be page 801. That page has the equation in big print with an explanation.

Note from the Author or Editor:
Skippy sharp note overlapping left of sharpen box: 807 should be 801 (A offset has been introduced between the QC1 version where I was asked to provide the correct page numbers and the printed version.)

Allen Roberts  Aug 26, 2009 
Printed
Page 826
Part c & d of Sharpen your pencil solution

In the Sharpen your pencil solution Part c The final value for the net Force should be -0.0878N rather than -0.878N. Part d The final value for the net Force should be -0.0888N rather than -0.888N.

Note from the Author or Editor:
The explanation is clear. To fit in the extra zeros, the textboxes for the answers may need to be extended. The Arrows pointing to each answer will need to be shortened slightly so that they don't overlap with the new answers.

Allen Roberts  Sep 08, 2009 
Printed
Page 834
4th line from the bottom

"Thuis" should be "This"

Note from the Author or Editor:
1st para under the picture: Thuis means should be This means

Allen Roberts  Aug 26, 2009