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Quiz Chapter 7: Graphs of Motion

10 questions · Form 4 Mathematics Bab 7: Graphs of Motion

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. If a vehicle accelerates from 10 m/s to 30 m/s in 5 seconds, what is its acceleration?

  1. A. 2 m/s²
  2. B. 4 m/s²
  3. C. 6 m/s²
  4. D. 8 m/s²
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Answer: B

Acceleration = v - ut = 30 - 105 = 205 = 4 m/s².

2. A car travels 150 km in 2.5 hours. What is its average speed in km/h?

  1. A. 50 km/h
  2. B. 60 km/h
  3. C. 75 km/h
  4. D. 90 km/h
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Answer: B

Average Speed = Total Distance / Total Time = 150 km / 2.5 h = 60 km/h.

3. Convert a speed of 72 km/h into m/s.

  1. A. 15 m/s
  2. B. 20 m/s
  3. C. 25 m/s
  4. D. 30 m/s
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Answer: B

72 km/h = 72 × 1000 m3600 s = 720003600 = 20 m/s.

4. A runner accelerates from 0 to 8 m/s in 4 seconds, runs at 8 m/s for 10 seconds, and stops in 2 seconds. What is the total distance covered?

  1. A. 88 m
  2. B. 104 m
  3. C. 112 m
  4. D. 128 m
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Answer: B

Total time = 4 + 10 + 2 = 16 s. Flat top duration = 10 s. Area of trapezium = 12 × (10 + 16) × 8 = 12 × 26 × 8 = 104 m.

5. What does a horizontal line on a speed-time graph signify?

  1. A. The object is stationary
  2. B. The object is moving at constant/uniform speed
  3. C. The object is accelerating at a constant rate
  4. D. The object has returned to its starting position
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Answer: B

A horizontal line on a speed-time graph means the speed remains constant over time (zero acceleration).

6. If a motorcycle decelerates from 25 m/s to a complete stop in 10 seconds, what is its rate of deceleration?

  1. A. -2.5 m/s²
  2. B. 2.5 m/s²
  3. C. 0.4 m/s²
  4. D. -0.4 m/s²
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Answer: B

Acceleration = 0 - 2510 = -2.5 m/s². The rate of deceleration (magnitude of slowing down) is 2.5 m/s².

7. A cyclist moves according to a distance-time graph. The distance increases from 0 km to 12 km in 0.5 hours. What is the speed in km/h?

  1. A. 6 km/h
  2. B. 12 km/h
  3. C. 24 km/h
  4. D. 48 km/h
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Answer: C

Speed = Gradient = 12 - 00.5 - 0 = 24 km/h.

8. What physical quantity does the gradient of a distance-time graph represent?

  1. A. Acceleration
  2. B. Speed
  3. C. Distance
  4. D. Time
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Answer: B

The gradient of a distance-time graph is the rate of change of distance with respect to time, which equals speed.

9. What does a negative gradient on a speed-time graph indicate?

  1. A. Deceleration (reduction in speed)
  2. B. Motion in the reverse direction
  3. C. Stationary position
  4. D. Constant acceleration
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Answer: A

A negative gradient on a speed-time graph indicates that speed is decreasing over time, which is deceleration.

10. What does a negative gradient on a distance-time graph indicate?

  1. A. The object is decelerating
  2. B. The object is returning towards the origin/starting point
  3. C. The object is speeding up
  4. D. The object is stationary
Show answer

Answer: B

A negative gradient on a distance-time graph means distance from the start point is decreasing, so the object is returning.

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