A 50 kg man with 20kg load on his head climbs up 20 steos of0.25 m height each
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Step-by-step explanation:
Workdone to climb a height h = potential energy gained to reach the height h = m×g×h Joules
m = mass of man+mass of load = 50+20 kg = 70 kg
h = 20×0.25 = 5 m
Potential energy gained = 70×9.8×5 = 3430 J
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