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Question
A man weighing 80 kg carries a weight of 40 kg on the top of a tower 60 m high. Find the work done by the man. Take g=10m/s2.
A man weighing 80 kg carries a weight of 40 kg on the top of a tower 60 m high. Find the work done by the man. Take g=10m/s2.
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Solution
Mass of man = 80 kg
Mass of object = 40 kg
Total mass = 80 kg + 40 kg = 120 kg
Acceleration due to gravity, g = 10 m/s²
Height = 60 m
Work done = Change in potential energy = m*g*h
= 120* 10* 60
= 72000 J.
Mass of man = 80 kg
Mass of object = 40 kg
Total mass = 80 kg + 40 kg = 120 kg
Acceleration due to gravity, g = 10 m/s²
Height = 60 m
Work done = Change in potential energy = m*g*h
= 120* 10* 60
= 72000 J.
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