Newton's laws of motion Quiz
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5 questions, one answer each
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1. A 2.0 kg trolley accelerates at 3.0 m/s². What is the resultant force on it?
- A. 0.67 N
- B. 6.0 N
- C. 5.0 N
- D. 1.5 N
2. Which law says an object keeps moving at constant velocity unless a resultant force acts?
- A. Newton's first law
- B. Newton's second law
- C. Newton's third law
- D. Hooke's law
3. A boy pushes on a wall with a force of 50 N. With what force does the wall push on him?
- A. 0 N
- B. 25 N
- C. 50 N
- D. 100 N
4. A skydiver reaches terminal velocity when
- A. her weight becomes zero
- B. air resistance becomes zero
- C. her weight is greater than the air resistance
- D. air resistance equals her weight
5. How does a seat belt help in a crash?
- A. It increases the mass of the car
- B. It applies a force that slows the passenger with the car
- C. It removes the passenger's inertia
- D. It makes the car stop faster