A boy weighting 500N climbs 40m vertically when walking up the stairs in an office block. How much work does he do against gravity
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Work done against gravity is equal to gravitational potential energy. = mgh
Given
Weight= mg = 500 N
height = 40 m
work done against gravity= 500×40
= 20000J
Given
Weight= mg = 500 N
height = 40 m
work done against gravity= 500×40
= 20000J
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