Head First Physics

Chapter 21. Think Like a Physicist: It’s the final chapter

It’s time to hit the ground running. Throughout this book, you’ve been learning to relate physics to everyday life and have absorbed problem solving skills along the way. In this final chapter, you’ll use your new set of physics tools to dig into the problem we started off with - the bottomless pit through the center of the Earth. The key is the question: “How can I use what I know to work out what I don’t know (yet)?“

You’ve come a long way!

Back in Chapter 1, the words on the globe looked like random jargon that didn’t make sense. But as you’ve gone through the book learning to relate physics to everyday life, your confidence has grown and the words have become less like an alien language.

“How can I use what I know to work out what I don’t know (yet)?”

Now you’re in Chapter 21 - and you’re able to use these same words to help you think through and solve problems. You’ve learned to ask “How can I use what I know to work out what I don’t know (yet)?“

Now you can finish off the globe

What better way to use your physics superpowers than to revisit the tunnel through the center of the Earth and really get to grips with what happens there.

Back in Chapter 1, you learned to be part of it by putting yourself at the heart of the problem ...