Question

When is the work done by a body negative? Give an example for it.

Answer 1

Answer:

When displacement of the body is in direction opposite to direction of force e.g. when a person lifts a weight then the displacement of the body is in direction opposite to Gravitational Force and thus it can be said that the work done on the body by gravity is NEGATIVE (angle between Gravitational Force and ...

Explanation:

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Answer 2

Answer:

when displacement of the body is in direction opposite to direction of force e.g. when a person lifts a weight then the displacement of the body is in direction opposite to Gravitational Force and thus it can be said that the work done on the body by gravity is NEGATIVE (angle between Gravitational Force and displacement is 180° and cos 180 = -1)