ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item NG065005: 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 kinetic energy (motion 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 kinetic energy (motion energy) is used up each time it swings from side to side, but the kinetic energy is not transferred anywhere else.
- Some kinetic energy (motion energy) is transferred somewhere else, like the air, and some motion energy is used up.
- An object only has kinetic energy (motion energy) when a person makes it move, and the student is no longer pushing the ball.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 529
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 558 | 2011 | 28% |
| Grades | |||
| 4–5 | 104 | 440 | 24% |
| 6–8 | 211 | 873 | 24% |
| 9–12 | 243 | 698 | 35% |
| Gender | |||
| Male | 254 | 907 | 28% |
| Female | 290 | 1058 | 27% |
| Primary Language | |||
| English | 499 | 1784 | 28% |
| Other | 44 | 176 | 25% |