A boy weighing 40kg climbs up a vertical height of 200m . Calculate the amount of work done by him. How much potential energy does he gain? ( Take g= 9.8m/s²)
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Given: Weight of the boy = 40kg
Vertical height climbed = 200m
To Find: Amount of work done
Amount of potential energy gained
Solution:
Mass in kilogram = 40 kg
Height above the ground = 200m
Acceleration due to gravity = 9.8m/s²
Potential Energy = m x g x h
= 40 x 9.8 x 200
= 78400 J
Therefore, Work done is equal to potential energy by work-energy theorem = 78400J
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