Look at the activity listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A donkey is carrying a load on its back.

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Solution

The donkey is carrying the weight on his back, so the displacement is not in direction of the force applied.
In fact, the force due to gravity and the displacement caused are perpendicular to each other.
Hence, the work done is zero.

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