Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Motion energy (kinetic energy) is associated with the speed and the mass of an object.
Item EG003002: Two children that have the same mass and are sledding at the same speed have the same amount of motion energy.
A boy and a girl are sledding down a hill. The boy and the girl weigh the same, and they are using sleds that weigh the same.
If the boy and girl are sledding at the same speed, which child has more motion energy (kinetic energy)?
- The boy has more motion energy.
- The girl has more motion energy.
- Both of them have the same amount of motion energy.
- Neither the boy nor the girl has any motion energy.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
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|---|---|---|---|---|---|---|---|---|
| n = 2287 |
6–8 n = 1429 |
9–12 n = 848 |
Male n = 1137 |
Female n = 1111 |
English n = 2026 |
Other n = 212 |
||
| A. | The boy has more motion energy. | 22% | 23% | 19% | 21% | 23% | 21% | 31% |
| B. | The girl has more motion energy. | 14% | 14% | 13% | 13% | 14% | 14% | 13% |
| C. | Both of them have the same amount of motion energy. | 58% | 56% | 61% | 59% | 57% | 59% | 49% |
| D. | Neither the boy nor the girl has any motion energy. | 6% | 6% | 7% | 7% | 6% | 6% | 7% |