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Work

Arjun weighin...

Question

Arjun weighing 50 kg start climbing a rope.He takes 10 s to reach a height of 8m.

a)What is work done by him?

b)At what rate does he do this work

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Solution

Work done by Arjun = Force acting by Arjun for climbing up a rope × displacement
= ( weight of Arjun ) × height = mgh
= 50kg × 10m/s² × 8m [ g = 10m/s²
= 4000J

hence, work done by Arjun = 4000J

rate of work done by him = work done/time taken = 4000J/10s = 400 J/s = 400 W

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