Item NG099001: When skateboarding down a hill, gravitational potential energy is transformed into motion energy and thermal energy.
A girl is riding her skateboard down a hill. She speeds up as she goes down the hill, and the wheels 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 |
Language |
|||
|---|---|---|---|---|---|---|---|
| 6–8 | 9–12 | Male | Female | Primary Language is English | Primary Language is not English | ||
| A. | 31% | 35% | 25% | 29% | 33% | 32% | 27% |
| B. | 46% | 42% | 53% | 47% | 45% | 46% | 38% |
| C. | 15% | 16% | 15% | 16% | 15% | 15% | 24% |
| D. | 8% | 8% | 7% | 8% | 7% | 7% | 12% |