ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG159002: When one car hits another car and the speed of the cars changes, the change in speed is a sign that energy was transferred.
Two carts are rolling on a smooth flat surface. Cart A is rolling faster than Cart B and hits the back of Cart B.
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After Cart A hits Cart B, both carts continue rolling forward. Each cart is going a different speed than it was before. Was energy transferred from Cart A to Cart B?
- No, Cart A does not have any energy to transfer.
- No, energy is not transferred when two objects hit each other.
- Yes, the change in speed is a sign that energy was transferred.
- Yes, energy was transferred, but the change in speed is not related to the transfer of energy.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 447
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 5826 | 8453 | 69% |
| Grades | |||
| 4–5 | 875 | 1422 | 62% |
| 6–8 | 2678 | 3922 | 68% |
| 9–12 | 2273 | 3109 | 73% |
| Gender | |||
| Male | 2839 | 4024 | 71% |
| Female | 2848 | 4221 | 67% |
| Primary Language | |||
| English | 5213 | 7465 | 70% |
| Other | 461 | 741 | 62% |