ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
When objects collide, contact forces can transfer energy from one object to another resulting in a change in the…
Item RG096002: After one ball collides with another, the first ball moves slower.
A player rolls Ball A toward Ball B as pictured in Figure 1. Then Ball A hits Ball B. Both balls continue to roll after the collision as shown in Figure 2.
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How fast is Ball A moving before the collision (Figure 1) compared to after the collision (Figure 2)?
- Ball A is moving faster before the collision.
- Ball A is moving slower before the collision.
- Ball A is moving at the same speed before and after the collision.
- Additional information is required to answer this question.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 481
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 718 | 1372 | 52% |
| Grades | |||
| 4–5 | 116 | 251 | 46% |
| 6–8 | 333 | 669 | 50% |
| 9–12 | 269 | 452 | 60% |
| Gender | |||
| Male | 352 | 668 | 53% |
| Female | 358 | 687 | 52% |
| Primary Language | |||
| English | 645 | 1208 | 53% |
| Other | 59 | 138 | 43% |