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WAEC WASSCE Physics 2002 past questions and answers

This 2002 WAEC WASSCE Physics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2002 set with instant marking.

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Sample WAEC WASSCE Physics 2002 questions

1. A block rests on a horizontal surface with a normal reaction of 80 N. If the coefficient of friction is 0.25, what is the limiting frictional force?
  1. 20 N
  2. 32 N
  3. 80 N
  4. 320 N

Answer: A. 20 N

Limiting friction equals the coefficient of friction multiplied by the normal reaction, so 0.25 x 80 = 20 N.

2. A ball is projected horizontally from a platform 20 m above level ground; taking g as 10 m/s^2, how long does it take to reach the ground?
  1. 1 s
  2. sqrt(2) s
  3. 2 s
  4. 4 s

Answer: C. 2 s

The vertical fall satisfies 20 = (1/2) x 10 x t^2, giving t = 2 s.

3. A 2 kg trolley moving at 3 m/s collides with a stationary 1 kg trolley and they stick together; what is their common speed just after impact?
  1. 1 m/s
  2. 1.5 m/s
  3. 2 m/s
  4. 3 m/s

Answer: C. 2 m/s

Conservation of momentum gives (2 x 3) = (2 + 1)v, so v = 2 m/s.

4. A 5 kg load is lifted vertically through 4 m; taking g as 10 m/s^2, how much gravitational potential energy does it gain?
  1. 20 J
  2. 200 J
  3. 500 J
  4. 2 000 J

Answer: B. 200 J

The gain in potential energy is mgh = 5 x 10 x 4 = 200 J.

5. What is the weight of a 6 kg object where the gravitational field strength is 9.8 N/kg?
  1. 58.8 N
  2. 6.0 N
  3. 15.8 N
  4. 60.0 kg

Answer: A. 58.8 N

Weight is mass multiplied by gravitational field strength, so 6 x 9.8 = 58.8 N.

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