Original Project
Force and Motion
Item FM093002: A cart that is being pushed with constant force can move faster than the person pushing it if the force of the push is greater than the force of friction on the cart.
Which of the following statements is TRUE about the motion of a cart that is being pushed on a level surface?
- The cart is moving at constant speed if the force of the push is constant and less than the force of friction on the cart.
- The cart is moving at constant speed if the force of the push is constant and is greater than the force of friction on the cart.
- The cart is moving faster and faster if the force of the push is constant and is greater than the force of friction on the cart.
- The cart is moving faster and faster if the force of the push is constant and the same strength as the force of friction on the cart.
Answer Choice |
Overall |
Grades |
Gender |
Primary Language |
||||
|---|---|---|---|---|---|---|---|---|
| n = 3537 |
6–8 n = 2242 |
9–12 n = 1285 |
Male n = 1689 |
Female n = 1775 |
English n = 3187 |
Other n = 279 |
||
| A. | The cart is moving at constant speed if the force of the push is constant and less than the force of friction on the cart. | 20% | 21% | 19% | 19% | 21% | 20% | 27% |
| B. | The cart is moving at constant speed if the force of the push is constant and is greater than the force of friction on the cart. | 54% | 51% | 60% | 56% | 52% | 55% | 42% |
| C. | The cart is moving faster and faster if the force of the push is constant and is greater than the force of friction on the cart. | 16% | 17% | 14% | 16% | 15% | 16% | 18% |
| D. | The cart is moving faster and faster if the force of the push is constant and the same strength as the force of friction on the cart. | 10% | 12% | 7% | 9% | 11% | 10% | 14% |