Question

When no work is said to be done?

Answer 1

Heya!!

●No work is said to be done when the angle between the displacement and force applied is 90 degree i.e the force applied is perpendicular to the displacement.

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Answer 2

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If a force acts on a body and the body doesnot move i.e., displacement is zero, then no work is said to be done.

For example, if a coolie lifts an object but doesnot move, then he has done no work. But if he moves even an inch, then work is said to be done.

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