|
QUIZ 5 Nota means none of the above. |
|
|
| 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 |