A man weighing 70 kg carries a 30 kg box to the top of a building 20 m high . Calculate the work done by the man .
Asked by Chaudharidc009
3rd January 2021,
8:29 PM
Answered by Expert
Answer:
Workdone by the man is same as potential energy gained
Potential energy = M × g × h
where M is mass of man and mass of the box that he carries = ( 70 + 30 ) kg = 100 kg
Potential energy = 100 × 9.8 × 20 = 19600 J = 19.6 kJ
Workdone by the man = 19.6 kJ
Answered by Expert
3rd January 2021,
10:07 PM
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