Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Energy can be transformed (converted) within a system.
Item NG016003: When a ball rolls downhill, the gravitational potential energy of the ball is transformed into motion energy.
A ball is rolling up and over a hill. The ball slows down as it moves from Position 1 to Position 3, and it speeds up as it moves from Position 3 to Position 5.
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When is the gravitational potential energy of the ball being transformed into motion energy (kinetic energy)?
- Only when the ball rolls from Position 1 to Position 3
- Only when the ball rolls from Position 3 to Position 5
- The entire time the ball is rolling from Position 1 to Position 5
- It is not being transformed at any time because gravitational potential energy cannot be transformed into motion energy (kinetic energy).
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 1663 | 3024 | 55% |
| Grades | |||
| 6–8 | 981 | 1846 | 53% |
| 9–12 | 680 | 1167 | 58% |
| Gender | |||
| Male | 800 | 1411 | 57% |
| Female | 831 | 1539 | 54% |
| Primary Language | |||
| English | 1478 | 2642 | 56% |
| Other | 133 | 280 | 48% |