Physics

A man pulls a bucket of water of mass 10kg from a well 5meter deep in 5 sec. Calculate the power of the man.

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  1. Power = Work Done / Time
    Work Done = Change in Potential Energy

    Change in Potential Energy = mgh

    Therefore,

    Power = mgh/t
    = 10*5*9.8/5
    = 98 W

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  2. Here,m=10kg
    h=5meter
    t=5sec
    g=10m/s

    and,since P=(m×g×h)÷t
    (10×10×10)÷5
    =100

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