Forces, Movement & Changing Shape Quiz
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5 questions, one answer each
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1. What type of quantity is force?
- A. Scalar
- B. Vector
- C. Neither scalar nor vector
- D. Always positive only
2. What is stopping distance equal to?
- A. Thinking distance only
- B. Braking distance only
- C. Thinking distance + braking distance
- D. Thinking distance − braking distance
3. A 4 kg object experiences a resultant force of 20 N. What is its acceleration?
- A. 0.2 m/s²
- B. 5 m/s²
- C. 16 m/s²
- D. 80 m/s²
4. Why does a falling object reach terminal velocity?
- A. Gravity stops acting on it
- B. Air resistance becomes equal to its weight, giving zero resultant force
- C. The object runs out of kinetic energy
- D. Air resistance becomes greater than weight and pushes it upward
5. On a force-extension graph, what does the initial straight-line region through the origin represent?
- A. The elastic limit has been exceeded
- B. Hooke's law applies — extension is proportional to force
- C. The material has broken
- D. Extension is inversely proportional to force