Multiple choice

The power of a water pump is 1 kW. If g = 10 ms-2, the amount of water it can raise in one minute to a height of 15 m is

  1. 400 litre

  2. 2000 litre

  3. 1500 litre

  4. 300 litre

  5. 100 litre
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

P = mgh / t or m = (p Χ t) / (g Χ h) m = (1000W Χ 60s) / (10 ms-2 Χ15 m) = 400 kg = 400 litre.

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