Original Project
Force and Motion
If a force acts on an object in the direction opposite to the direction of the object’s motion, the object’s…
Item FM096001: A hockey puck that is sliding across the ice will move slower and slower the entire time it slides across the ice.
What will happen to a hockey puck that is sliding along the ice if friction is acting?
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- The puck will move slower and slower the entire time.
- The puck will move at a constant speed the entire time.
- The puck will move at constant speed for a while and then slow down.
- The puck will slow down for a while and then move at a slower constant speed.
- Distribution of Responses
- Students Responding Correctly
| Group | Correct | Total | Percent |
|---|---|---|---|
| Overall | 554 | 1801 | 31% |
| Grades | |||
| 6–8 | 312 | 1130 | 28% |
| 9–12 | 238 | 662 | 36% |
| Gender | |||
| Male | 320 | 835 | 38% |
| Female | 218 | 918 | 24% |
| Primary Language | |||
| English | 506 | 1587 | 32% |
| Other | 38 | 179 | 21% |
- Disciplinary Core Ideas
- PS2.A The motion of an object is determined by the sum of the forces acting on it; if the total force on the object is not zero, its motion will change. The greater the mass of the object, the greater the force needed to achieve the same change in motion. For any given object, a larger force causes a larger change in motion.
PS2.A Newton's second law accurately predicts changes in the motion of macroscopic objects.