Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Item NG003003: Gravitational potential energy is transformed into motion energy and thermal energy when coasting down a hill on a bicycle.
A girl is riding her bicycle down a hill without pedaling. She speeds up as she goes down the hill, and the tires get a little warmer. What energy transformations happen while she is going down the hill?
- Motion energy (kinetic energy) is transformed into gravitational potential energy and thermal energy.
- Gravitational potential energy is transformed into motion energy (kinetic energy) and thermal energy.
- Gravitational potential energy is transformed only into motion energy (kinetic energy).
- No energy transformations are involved while she is going down the hill.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
|||
|---|---|---|---|---|---|---|---|
| n = 3031 |
6–8 n = 1908 |
9–12 n = 1114 |
Male n = 1460 |
Female n = 1525 |
English n = 2749 |
Other n = 196 |
|
| A. | 27% | 29% | 24% | 25% | 29% | 27% | 27% |
| B. | 49% | 45% | 56% | 49% | 49% | 50% | 37% |
| C. | 16% | 18% | 13% | 17% | 15% | 16% | 22% |
| D. | 7% | 8% | 6% | 8% | 7% | 7% | 13% |