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

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

  • Option 1)

    5880 W

  • Option 2)

    3920 W

  • Option 3)

    1960 W

  • Option 4)

    4410 W

 
Answers (1)
599 Views

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


Option 1)

5880 W

Option is incorrect

Option 2)

3920 W

Option is incorrect

Option 3)

1960 W

Option is correct

Option 4)

4410 W

Option is incorrect

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