When you have completed this chapter you should be able to: 1. Explain what is meant by work.
2. Explain what is meant by power.
3. Distinguish between kinetic energy and potential energy.
4. Give several examples of potential energy.
5. State the law of conservation of energy and give several examples of energy transformations.
6. Discuss why heat is today regarded as a form of energy rather than as an actual substance.
7. Define linear momentum and discuss its significance.
8. Use the principle of conservation of linear momentum to analyze the motion of objects that push each other apart, for instance, when a rocket is fired.
9. State what is meant by angular momentum.
10. Explain how conservation of angular momentum is used by skaters to spin faster and by footballs to travel farther.
11. Describe several relativistic effects and indicate why they are not conspicuous in the everyday world.
12. Explain what is meant by rest energy and be able to calculate the rest energy of an object of given mass.
13. Describe how gravity is interpreted in Einstein's general theory of relativity.
14. Discuss the various factors that are part of the energy problem of the future.