Practice Test Answers

Practice Test Answers

Written response:
Circular Motion:
1. 1600 N
2. 7.7 rpm
3. coefficient when “just about to slip” = 0.61, so mu = 0.82 is fine
4. 11 N
Gravitation:
5. 9.2 hours
6. 3.3E8 m/s (note this is faster than the speed of light – no escape!)
7. 4.3E7 m
8. v = 7510 m/s, ET = -1.18E12 J

Multiple choice:
Circular Motion:
1. C
2. B
3. B
4. B
5. C
6. <not expected>
7. B
8. D
9. A
10. C
Gravitation:
11. B
12. E
13. F
14. D
15. E
16. H
17. B
18. C
19. A
20. I get 3.5E13 m. Not a listed option.

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