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.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 514
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 606 | 1828 | 33% |
| Grades | |||
| 4–5 | 68 | 311 | 22% |
| 6–8 | 236 | 763 | 31% |
| 9–12 | 302 | 754 | 40% |
| Gender | |||
| Male | 279 | 853 | 33% |
| Female | 311 | 937 | 33% |
| Primary Language | |||
| English | 533 | 1625 | 33% |
| Other | 54 | 151 | 36% |