Physics
A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
Work, Energy & Power
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Answer
Given:
Mass (m) = 20 kg
Distance (d) = Height = 2.5 m
Force of gravity on mass of 1 kg = 10 N
Work done (W) = ?
Force (F) = mg = 20 x 10 = 200 N
Work done = Force x distance = 200 x 2.5 = 500 J
So, the work done by the man = 500 J.
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