ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item EG090002: Two identical balls that are thrown up in the air will have the same amount of gravitational potential energy when they are at the same height above the ground.
A student throws two identical balls into the air. For the balls to have the same amount of gravitational potential energy at a certain point in time, what must be true?
- They must be moving at the same speed.
- They must be at the same height above the ground.
- They must have been thrown at the same time.
- They must have been thrown with the same amount of force.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
|||||
|---|---|---|---|---|---|---|---|---|---|
| n = 1828 |
4–5 n = 311 | 6–8 n = 763 |
9–12 n = 754 |
Male n = 853 |
Female n = 937 |
English n = 1625 |
Other n = 151 |
||
| A. | They must be moving at the same speed. | 16% | 23% | 17% | 12% | 15% | 17% | 16% | 17% |
| B. | They must be at the same height above the ground. | 33% | 22% | 31% | 40% | 33% | 33% | 33% | 36% |
| C. | They must have been thrown at the same time. | 17% | 17% | 20% | 14% | 17% | 17% | 17% | 15% |
| D. | They must have been thrown with the same amount of force. | 34% | 38% | 33% | 33% | 35% | 34% | 34% | 32% |