Question

The power of a motor pump is 2 kW. How much water per minute the pump can raise to a height of 10 m? (Given g = 10 m s–2)

Answer 1

Answer:

Power=Work/Time

      P=W/t

      P=mgh/t

    2000=m×10×10/60

   ∴m=20×60=1200 kg=1200 L

Answer 2

Answer: 1200 L

Explanation:

power = work/time

work = potential energy = mgh

g= 10 m/s

h = 10m

m=m

t= 1m = 60sec

2kW = m*100/60

m=12kW/10

1200L

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