ICSE Class 9 Answered
A 50kg man with 20kg load on his head climbs up 20 steps of 0.25m height each.The work done on climbing is?
Asked by girishbiswal | 21 May, 2018, 07:29: PM
Expert Answer
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
Answered by Thiyagarajan K | 21 May, 2018, 10:22: PM
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