Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Item NG065004: A pendulum stops swinging because the motion energy of the ball is transferred somewhere else, like the air, as the ball swings from side to side.
A student is playing with a pendulum (a ball attached to the end of a string). He gives the ball a push and watches the ball as it swings from side to side. After a while, the ball stops swinging.
Why does the ball stop swinging?
- The motion energy (kinetic energy) of the ball is transferred somewhere else, like the air, as the ball swings from side to side.
- A little bit of the ball’s motion energy (kinetic energy) is used up each time it swings from side to side, but the motion energy is not transferred anywhere else.
- Some motion energy (kinetic energy) is transferred somewhere else, like the air, and some motion energy is used up.
- An object only has motion energy (kinetic energy) when a person makes it move, and the student is no longer pushing the ball.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
|||
|---|---|---|---|---|---|---|---|
| n = 3844 |
6–8 n = 2366 |
9–12 n = 1465 |
Male n = 1820 |
Female n = 1942 |
English n = 3408 |
Other n = 309 |
|
| A. | 25% | 20% | 32% | 28% | 22% | 25% | 21% |
| B. | 39% | 42% | 35% | 37% | 41% | 39% | 41% |
| C. | 21% | 21% | 21% | 21% | 20% | 21% | 17% |
| D. | 15% | 17% | 13% | 14% | 17% | 15% | 21% |