ASPECt
Energy: Forms, Transformation, Transfer, and Conservation
Item NG014003: As a rubber balls falls to the floor, the motion energy of the ball increases and the gravitational potential energy of the ball decreases because the gravitational potential energy is transformed into motion energy.
A rubber ball speeds up as it falls toward the floor. How and why do the kinetic energy (motion energy) and gravitational potential energy of the ball change as it falls?
- The gravitational potential energy stays the same and the kinetic energy increases because as an object speeds up, new energy in the form of kinetic energy is made.
- The kinetic energy stays the same and the gravitational potential energy decreases because as an object speeds up, gravitational potential energy is used up and is not converted into any other form of energy.
- The kinetic energy decreases, and the gravitational potential energy increases because the kinetic energy is converted into gravitational potential energy.
- The kinetic energy increases, and the gravitational potential energy decreases because the gravitational potential energy is converted into kinetic energy.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 976 |
4–5 n = 0 | 6–8 n = 629 |
9–12 n = 347 |
Male n = 443 |
Female n = 505 |
English n = 853 |
Other n = 99 |
|
| A. | 25% | N/A | 25% | 27% | 27% | 24% | 26% | 19% |
| B. | 18% | N/A | 19% | 16% | 18% | 18% | 18% | 18% |
| C. | 25% | N/A | 27% | 23% | 24% | 27% | 25% | 32% |
| D. | 31% | N/A | 29% | 35% | 31% | 31% | 31% | 30% |