1.

What is the power of pump which takes 10 s to lift 100 kg of water to water tank situated at a height of 20 m.

Answer»

We have,m= 100kgg= 10 m/s²t = 10swork done = mghW = 100 X 10 X 20Work done = 20000 JP = Work done/time takenPower = 20000/10Therefore, power = 2000 W



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