ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item EG040004: For two rubber bands stretched the same amount, the rubber band that was harder to stretch has more elastic energy.
A student has two rubber bands that are the same except that one rubber band is easier to stretch than the other rubber band. The student stretches each rubber band around two pegs so that the rubber bands are stretched the same length.
When the rubber bands are stretched the same length, which rubber band has more elastic potential energy?
- The rubber band that is easier to stretch has more elastic potential energy.
- The rubber band that is harder to stretch has more elastic potential energy.
- Both rubber bands have the same amount of elastic potential energy because elastic potential energy depends only on how far an object is stretched.
- Neither rubber band has any elastic potential energy because they lost their elastic potential energy when they were stretched.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 492
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 894 | 1929 | 46% |
| Grades | |||
| 4–5 | 159 | 394 | 40% |
| 6–8 | 323 | 754 | 43% |
| 9–12 | 412 | 781 | 53% |
| Gender | |||
| Male | 452 | 917 | 49% |
| Female | 420 | 980 | 43% |
| Primary Language | |||
| English | 807 | 1725 | 47% |
| Other | 64 | 160 | 40% |