Question

A porter Carries luggage on his head and take it off at the railway
platform, has he done any work explain ?
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Answer 1

Explanation:

Gravitational force on the box is acting in the downward direction. Since the boy walks horizontally, his vertical displacement is zero. Hence, when a boy carrying load on his head moves over a horizontal road, work done against gravitational force is zero.

Answer 2

Answer:

When Porter stands on the platform with suitcase ,then there is no moment in suitcases. So, work done by Porter on suitcase is 0.

But if he is carrying it to the railway

he is using energy and in this case the there is movement of the object ( the luggage ) when force is applied on it by the porter

Hence work is done