Question

the power of a motar pump is 5KW. how much water per minute the pump can raise to height of 20m? take g=10ms-2

Expert Reply
Mon May 07, 2012

power (P) = work done (or energy) / time

 

here work done = potential energy = mgh

and time, t = 60s

so,

P = 5000 W

g = 10 m/s2

h = 20 m

 

or the amount of water lifted would be

m = Pt / gh = (5000 x 60) / (10 x 20)

or

m = 1500 kg

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