Original Project
Energy: Forms, Transformation, Transfer, and Conservation
Motion energy (kinetic energy) is associated with the speed and the mass of an object.
Item EG001005: 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 motion energy (kinetic energy)?
- Ball 1 has more motion energy.
- Ball 2 has more motion energy.
- Both balls have the same amount of motion energy.
- Neither ball has any motion energy.
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 1603 | 2523 | 64% |
| Grades | |||
| 6–8 | 903 | 1439 | 63% |
| 9–12 | 693 | 1074 | 65% |
| Gender | |||
| Male | 786 | 1248 | 63% |
| Female | 789 | 1228 | 64% |
| Primary Language | |||
| English | 1412 | 2191 | 64% |
| Other | 146 | 258 | 57% |