Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Item NG017003: The motion energy of a ball rolling back and forth in a curved track is converted to gravitational potential energy only when it is rolling uphill.
A ball, starting from rest at Position 1, rolls down and then up a curved track towards Position 5. The ball speeds up as it rolls from Position 1 to Position 3, and it slows down as it rolls from Position 3 to Position 5. When it reaches Position 5, it rolls back down the track.
.jpg)
When is the motion energy (kinetic energy) of the ball being transformed into gravitational potential 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 motion energy (kinetic energy) cannot be transformed into gravitational potential energy.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
|||
|---|---|---|---|---|---|---|---|
| n = 2991 |
6–8 n = 1894 |
9–12 n = 1084 |
Male n = 1422 |
Female n = 1504 |
English n = 2626 |
Other n = 272 |
|
| A. | 26% | 27% | 24% | 23% | 30% | 26% | 26% |
| B. | 34% | 31% | 38% | 36% | 31% | 34% | 30% |
| C. | 29% | 30% | 27% | 28% | 29% | 28% | 34% |
| D. | 12% | 12% | 11% | 13% | 10% | 12% | 10% |