Scientifically, work is said to be done in which of the following cases?

Manish pulls the trolley for a certain distance.

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Manoj pushes the wall with no change in the position of wall.

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Mira studies for her exam.

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Mira pulls the wall with no change in the position of wall.

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Solution

The correct option is A Manish pulls the trolley for a certain distance.
Work is done when a force is applied and that force brings about some change in the position of the body.
So only in the case where Manish pulls the trolley for a certain distance, work is done.

Suggest Corrections

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State whether work is done or not by writing yes or no, in the following cases:

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