Question

A lady pulles a bucket filled with water having mass 10 kg from a well 8metre deep in 20 seconds. calculate work done and power .​

Answer 1

Answer:

Force applied by lady to overcome gravitational force =10*9.8=98N

s= 8

w= f*s= 98*8=784J

power = w/time

= 784/20=39.2. J/s or w

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Answer 2

work done=mgh=10×10×8=800j

power=energy/time=800/20=4watt