Velocity–Time Graphs and Terminal Velocity Quiz
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5 questions, one answer each
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1. What does the gradient of a velocity–time graph represent?
- A. A. Distance travelled
- B. B. Speed
- C. C. Acceleration
- D. D. Displacement
2. A skydiver falls and eventually moves at a constant speed before opening their parachute. What is this constant speed called?
- A. A. Free fall speed
- B. B. Average speed
- C. C. Terminal velocity
- D. D. Resultant speed
3. A car accelerates from 12 m/s to 24 m/s in 4 s. What is its acceleration?
- A. A. 3 m/s²
- B. B. 4 m/s²
- C. C. 6 m/s²
- D. D. 12 m/s²
4. Why does a falling object's acceleration decrease as it speeds up, before it reaches terminal velocity?
- A. A. Its weight decreases as it falls
- B. B. Drag increases with speed, reducing the resultant force
- C. C. Gravity gets weaker closer to the ground
- D. D. The object's mass decreases
5. (HT) A ball is dropped from rest and falls 45 m before hitting the ground, accelerating uniformly at 9.8 m/s². Using v² − u² = 2as, what is its speed just before impact (to 1 d.p.)?
- A. A. 9.4 m/s
- B. B. 29.7 m/s
- C. C. 441 m/s
- D. D. 88.2 m/s