Physics 211, Homework Set #5

These problems are due Wednesday, April 14, at 5 PM. You may place your solutions in the mailbox outside my office door, or bring them into class.

The grading scheme for the homework set is as follows: three of the problems will be chosen to count for 10 points, and you may be given partial credit on them. You will receive 1 point for at least attempting each of the other questions. However, you do not know which of the questions will be chosen for detailed grading ... and therefore you should do them all.

1. Cutnell and Johnson, Chap 6, problem 3
2. Cutnell and Johnson, Chap 6, problem 4
3. Cutnell and Johnson, Chap 6, problem 20
4. Cutnell and Johnson, Chap 6, problem 24
5. Cutnell and Johnson, Chap 6, problem 32
6. Cutnell and Johnson, Chap 6, problem 36
7. Cutnell and Johnson, Chap 6, problem 42
8. Cutnell and Johnson, Chap 6, problem 47
9. Cutnell and Johnson, Chap 6, problem 51
10. Cutnell and Johnson, Chap 6, problem 59
11. Cutnell and Johnson, Chap 6, problem 82

12. The Hoover Dam was one of the largest dams in the world at the time it was built, in the nineteen thirties.
    • What is the height the dam?
    • What is the mass of the dam?
    • How much work did it take to lift all the pieces into place? Assume that the construction was arranged so that all material had to be lifted into place from the bottom of the valley (in reality, the top portions were lowered into place from the top of the canyon).
    • How much power does the hydroelectric plant now generate?
    • How long would it take the plant to provide the energy needed to lift the materials into place?

This page maintained by Michael Richmond. Last modified Mar 8, 1999.