A weight lifter lifts 300 kg from the ground to a height of 4m in 3 seconds. The average power generated by him is

Answers (1)

As we learnt in 

Work done by time dependent force -

W= \int \vec{F}\cdot \vec{v}\: dt

- wherein

Where \vec{F} and \vec{v} are force and velocity vector at any instant

 

 Average\: power =\frac{total\: energy\: consumed}{total\:time\:taken}

=\frac{mgh}{3s}=\frac{5880}{3}=1960w

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