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.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
|||||
|---|---|---|---|---|---|---|---|---|---|
| n = 8453 |
4–5 n = 1422 | 6–8 n = 3922 |
9–12 n = 3109 |
Male n = 4024 |
Female n = 4221 |
English n = 7465 |
Other n = 741 |
||
| A. | No, Cart A does not have any energy to transfer. | 6% | 8% | 6% | 6% | 7% | 5% | 6% | 7% |
| B. | No, energy is not transferred when two objects hit each other. | 10% | 11% | 10% | 9% | 9% | 10% | 9% | 15% |
| C. | Yes, the change in speed is a sign that energy was transferred. | 69% | 62% | 68% | 73% | 71% | 67% | 70% | 62% |
| D. | Yes, energy was transferred, but the change in speed is not related to the transfer of energy. | 15% | 19% | 16% | 12% | 13% | 17% | 15% | 16% |