Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Energy can be transferred from one system to another (or from a system to its environment) in different ways: by…
Item EG003003: 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.
- More information is needed to determine which child has more motion energy.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
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|---|---|---|---|---|---|---|---|---|
| n = 2522 |
6–8 n = 1388 |
9–12 n = 1126 |
Male n = 1212 |
Female n = 1258 |
English n = 2170 |
Other n = 276 |
||
| A. | The boy has more motion energy. | 20% | 21% | 19% | 21% | 19% | 19% | 24% |
| B. | The girl has more motion energy. | 16% | 16% | 15% | 15% | 16% | 15% | 19% |
| C. | Both of them have the same amount of motion energy. | 46% | 42% | 51% | 46% | 47% | 48% | 38% |
| D. | More information is needed to determine which child has more motion energy. | 18% | 20% | 16% | 18% | 18% | 18% | 19% |