May 2009
Beginner
248 pages
6h 21m
English
Content preview from The Manga Guide to Physics
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144 Chapter 3 Momentum
Therefore, the velocity after the two objects are combined is as follows:
mv + MV
1
—
m + M
= V
2
Units for Momentum
Let’s think about the unit we use to measure momentum. Recall that force is represented in
newtons (N), but momentum doesn’t use a special unit of measure. But from the equation
momentum = mass × velocity, you can tell that:
units for momentum = units for mass × units for velocity
= (kg) × (m/s) = (kg × m/s)
You can also use the fact that a change in momentum equals impulse to determine
the units for momentum. The units for momentum are the same as the units for impulse.
Therefore, the following expression is also ...
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