Motion Quiz
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5 questions, one answer each
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1. A car travels 150 metres in 6 seconds at constant speed. What is the car's speed?
- A. 25 m/s
- B. 156 m/s
- C. 144 m/s
- D. 0.04 m/s
2. What is the key difference between speed and velocity?
- A. Velocity is always faster than speed
- B. Speed is a scalar quantity; velocity is a scalar quantity with direction
- C. Velocity includes direction; speed does not
- D. There is no difference between them
3. An object's speed-time graph shows a straight line with a positive gradient from t = 0 s to t = 5 s, starting at 0 m/s and reaching 20 m/s. Calculate the acceleration during this period.
- A. 0 m/s²
- B. 4 m/s²
- C. 25 m/s²
- D. 100 m/s²
4. A runner travels 400 metres in 50 seconds, then 200 metres in 30 seconds. What is their average speed for the entire journey?
- A. 6 m/s
- B. 7.5 m/s
- C. 7.2 m/s
- D. 8 m/s
5. A speed-time graph for a falling object shows the velocity increasing linearly from 0 m/s to 50 m/s over 5 seconds, then remaining constant at 50 m/s. Which statement best explains this motion?
- A. The object is accelerating throughout due to gravity alone
- B. The object initially accelerates due to gravity, then reaches terminal velocity when air resistance equals gravitational force
- C. The object decelerates after 5 seconds due to increasing air resistance
- D. The object experiences zero acceleration at all times