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JAMB Physics 1984 Question 39

Question 39

Work, Energy and Power

If a water pump at Kainji Dam is capable of lifting 1000 kg of water through a vertical height of 10 m in 10 s, the power of the pump is (g = 10 m s−2)

  1. A.1.0 kW
  2. B.10.0 kW
  3. C.12.5 kW
  4. D.15.0 kW
  5. E.20.0 kW
Show the answer and explanation

Answer: B (10.0 kW)

Explanation

Power = mgh/t = 1000 × 10 × 10/10 = 10 000 W = 10 kW.