ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item EG001008: For two balls that have the same mass, the ball that is rolling faster has more motion energy.
Two identical balls are rolling down a hill. Ball 2 is rolling faster than Ball 1.
Which ball has more kinetic energy (motion energy)?
- Ball 1 has more kinetic energy.
- Ball 2 has more kinetic energy.
- Both balls have the same amount of kinetic energy.
- More information is needed to determine which ball has more kinetic energy.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 467
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 816 | 1337 | 61% |
| Grades | |||
| 4–5 | 167 | 234 | 71% |
| 6–8 | 357 | 644 | 55% |
| 9–12 | 292 | 459 | 64% |
| Gender | |||
| Male | 395 | 667 | 59% |
| Female | 405 | 646 | 63% |
| Primary Language | |||
| English | 737 | 1187 | 62% |
| Other | 58 | 118 | 49% |