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allochka39001 [22]

3 years ago

12

A water pump pumps 3 kg of water every second from the bottom of a well to the top of the well 50 m above if the pump used 2000

W of electrical power to accomplish the task what is the efficiency of the pump

1 answer:

vesna_86 [32]3 years ago

8 0

watts = work per second.

work is mgh = 3x10x50=1500

watts out = 1500

Watts used = 2000

eff=1500/2000=75%

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