A man weighing 60 kg carries a box weighing 10 kg to the top of a building 10 m high. Calculate the work done by the man on the box. Also calculate the total work done by him.

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Solution

Mass of man = 60kg
Mass of the box = 10 kg
Total mass= (60+10) kg = 70kg
Height of the building, h = 10m
Work done on the box, PE = mgh (put m as mass of the box solely)
Total Work done by the man, PE = mgh (put m as total mass of the box & man)
Get both the answers in joules!

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