5. A man raises a box of mass 50 kg to a height of 2 m in 20 s, while another

5. A man raises a box of mass 50 kg to a height

of 2 m in 20 s, while another man raises the same
box to the same height in 50 s.
(a) Compare : (i) the work done, and (ii) the power
developed by them.
(b) Calculate : (i) the work done, and (ii) the power
developed by each man. Take g = 10 N kg-1.​


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