QUIZ 5 Nota means none of the above. |
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The sample quiz below is under construction. Please keep checking back often to see the entire thing before the real quiz tomorrow. |
1. What would be the path of the earth if somehow all the gravitational forces on it vanished to zero? |
a. parabola |
b. straight line |
c. hyperbola |
d nota |
2. What is stronger, the force of gravity on a piece of aluminum or a piece of rubber of the same mass? |
a. force on rubber piece |
b. force on aluminum piece |
c. both forces are the same |
d nota |
3. At the midpoint between the moon and Earth, which force has the larger magnitude on a space ship traveling between those two bodies: The force of the moon or the force of the Earth? |
a. force of the moon |
b. force of the Earth |
c. both forces have the same magnitude at the midpoint. |
d. nota |
4. A peanut falls because of the gravitational force of attraction to the earth. How does the gravitational force attraction on the Earth to the peanut compare? |
a. It has a larger magnitude. |
b. It has a smaller magnitude |
c. It has the same magnitude |
d. nota |
5. In the previous problem, as the peanut falls, the Earth essentially does not move because |
a. The mass of the Earth is very large |
b. The force of attraction on the Earth to the peanut is zero. |
c. nota |
6. Suppose you were on the Moon as part of a space exploration. Suppose the Moon was somehow shrunk to a smaller radius, with no change in mass, while you were standing on its surface. How would your weight on the moon change? |
a. it would increase |
b. it would decrease |
c. not enough information to answer this question |
d. nota |
7. If you were standing in a freely falling elevator and you dropped your cell phone, the phone would |
a. fall downward toward the elevator floor |
b. hover in front of you |
c. rise toward the elevator ceiling. |
d. nota |
8. In the previous problem, assume you are another observer at rest watching the elevator in free fall. From your reference frame, the magnitude of the gravitational force on the phone is |
a. zero |
b. not zero |
c. nota |
9. As the Earth spins, how many high tides are there during one revolution? |
a. one |
b. four |
c. two |
d. nota |
10. The value of g is about 9.8 m/s2 at the Earth's surface. What is the value of g at a distance of twice the Earth's radius from the center of the Earth? |
a. 4.9 m/s2 |
b. 2.45 m/s2 |
c. 19.6 m/s2 |
d. nota |
11. Two planets are separated by a distance D and the magnitude of the force of attraction between them is F. If the distance between the planets is decreased by a factor of 2, the magnitude of the force of attraction will be |
a. 2F |
b. F/2 |
c. 4F |
d. F/4 |
e. nota |