University of Hawaii, Manoa
Dept. of Physics & Astronomy

Instructor: Michael Nassir
Office: Watanabe Hall, Rm. 426, (808) 956-2922
E-mail: nassir @

Return to PHYS 151 Exam & Answers page


Part A

1a. A
1b. E
1c. D
2. E
3a. B
3b. D
4. A
5. B
6. C
7. D
8a. D
8b. B
8c. A
8d. A
9. E
10a. F
10b. C
10c. E

Part B

1a. 0.16 g_Earth  OR  (4/25) g_Earth
1b. 670,000 km or 671,000 km (depending on which other moon's data is used)

2a. µ_static = tan (a) = 0.364
2b. v_final = sqrt(2 * g * h) = 5.42 m/s
2c(i). D (Since all three blocks fall through the same vertical distance, all three lose the same gravitational potential energy, and all three gain the same kinetic energy, so all three have the same final speed.)
2c(ii). C (The steeper the slope, the greater the downhill acceleration: a = g * sin(a). The greater the downhill acceleration, the shorter the time of descent.)