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

1. Manish pulls the trolley for a certain distance
2. Mira studies for her exam
3. Manoj pushes the wall with no change in the position of wall
4. Mira pulls the wall with no change in the position of wall

For the work done two factors are necessary:

1. there should be applied a force on the body

2. there should be a displacement in the body

Here, "Manish pulls the trolley for a certain distance" is the fit condition to be said to be work done.

Therefore, option a). is correct.

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Updated on: 10-Oct-2022

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