a man weighing 50 kg lifts a weight of 30 kg to the top of building 10 M high. find the work done by him. (take g=9.8m/s^2).
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Work done = force × displacement
= weight × height ( for vertically displaced body)
= mass of body on which force is applied × gravity × height
= 30 × 9.8 × 10
= 3000 J ( approx.)
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