CHAPTER 7 WORKSHEET

7.1

1. How is energy different from work?

2. A comet whizzes through space, it has lots of energy, but does no work. Why?

3. What would it take for the #2 comet to do work?

4. What units make up the "Newton meter"?

5. Why do work and energy both have Newton-meters as their units?

7.2

6. What is Kinetic Energy in?

7. Prove, using and example, that the Kinetic Energy unit is the joule.

8. What does an object need to have KE?

9. What two things does a unit of KE depend on?

10. Doubling mass does what to KE?

11. Doubling velocity does what to KE?