Each of the following statement describes a force acting. Which force is causing work to be done?
(a) the weight of a book at rest on a table
(b) the pull of a moving railway engine on its coaches
(c) the tension in an elastic band wrapped around a parcel
(d) the push of a person’s feet when standing on the floor

For the work done it is necessary that there should be a motion or displacement in the direction of the applied force.

So, the pull of a moving railway engine on its coaches is causing work done.

Therefore, option (b) is correct.

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Updated on: 10-Oct-2022

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