Momentum Quiz
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5 questions, one answer each
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1. What is the momentum of a 2.0 kg trolley moving at 5.0 m/s?
- A. 10 kg m/s
- B. 2.5 kg m/s
- C. 7.0 kg m/s
- D. 0.40 kg m/s
2. Two skaters at rest push each other apart. What is their total momentum just after?
- A. Positive
- B. Negative
- C. Zero
- D. Equal to their combined mass
3. A 1.0 kg trolley at 4.0 m/s sticks to a stationary 3.0 kg trolley. What is the velocity of the pair?
- A. 4.0 m/s
- B. 1.0 m/s
- C. 1.3 m/s
- D. 3.0 m/s
4. A change in momentum of 300 kg m/s takes 0.50 s. What is the average force?
- A. 150 N
- B. 300 N
- C. 1500 N
- D. 600 N
5. How does a crumple zone reduce injury in a crash?
- A. It reduces the car's momentum before the crash
- B. It increases the time taken to stop, so the force is smaller
- C. It increases the change in momentum, so passengers stop sooner
- D. It makes the force act for a shorter time