Look at the activity listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.

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Solution

For work to be done, force applied and displacement caused by it are the necessary conditions.
Force is applied by the engine, and it causes displacement in the train along the direction of the force applied.
The direction is forward. Hence, work is done by the engine in pulling the train.

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