ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item RG001004: Doubling the speed would have the bigger impact on increasing the kinetic energy (motion energy) of a moving object because kinetic energy increases with the square of the speed
Which would have the bigger impact on increasing the kinetic energy (motion energy) of a moving object and why: doubling the mass of the object or doubling the speed of the object?
- Doubling the speed because the amount of kinetic energy an object has depends only on its speed, not on its mass
- Doubling the speed because even though kinetic energy depends on both the mass and speed of an object, kinetic energy increases with the square of the speed
- Doubling the mass because even though kinetic energy depends on both the mass and speed of an object, kinetic energy increases with the square of the mass
- Doubling the mass or speed would have the same effect because kinetic energy depends equally on the mass and the speed of an object.
- Distribution of Responses
- Scale Score for Item Difficulty
(200[Easy]-800[Difficult]) - 512
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 2977 | 8432 | 35% |
| Grades | |||
| 4–5 | N/A | N/A | N/A |
| 6–8 | 1607 | 4713 | 34% |
| 9–12 | 1370 | 3719 | 37% |
| Gender | |||
| Male | 1357 | 4106 | 33% |
| Female | 1558 | 4154 | 38% |
| Primary Language | |||
| English | 2581 | 7302 | 35% |
| Other | 323 | 908 | 36% |