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NECO SSCE Physics 2004 past questions and answers

This 2004 NECO SSCE 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 2004 set with instant marking.

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Sample NECO SSCE Physics 2004 questions

1. A 4 kg load is lifted vertically through 3 m. Taking g as 10 m/s^2, how much work is done against gravity?
  1. 12 J
  2. 120 J
  3. 40 J
  4. 240 J

Answer: B. 120 J

The work done is the gain in gravitational potential energy, mgh = 4 x 10 x 3 = 120 J.

2. A machine performs 600 J of work in 20 s. What is its power output?
  1. 12 W
  2. 20 W
  3. 600 W
  4. 30 W

Answer: D. 30 W

Power is work divided by time, so 600/20 = 30 W.

3. A machine has a mechanical advantage of 4 and a velocity ratio of 5. What is its efficiency?
  1. 80%
  2. 20%
  3. 125%
  4. 9%

Answer: A. 80%

Efficiency is (mechanical advantage/velocity ratio) x 100%, giving (4/5) x 100% = 80%.

4. A force of 20 N acts perpendicular to a lever at a point 0.40 m from its pivot. What is the moment of the force about the pivot?
  1. 0.8 N m
  2. 50 N m
  3. 8 N m
  4. 20.4 N m

Answer: C. 8 N m

The moment is force times perpendicular distance, 20 x 0.40 = 8 N m.

5. A 2 kg trolley moving at 3 m/s collides with a stationary 1 kg trolley, and they move together afterwards. What is their common speed?
  1. 1 m/s
  2. 2 m/s
  3. 3 m/s
  4. 6 m/s

Answer: B. 2 m/s

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

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