Work, Energy and Power MCQ question and answer with solution | Physics Gk MCQs

Work is defined in physics as the product of force and displacement in the direction of the force.

This means that work is only said to be done when a force causes displacement of a body.

If there is no displacement, even if a force is applied, no work is done in the physics sense.

Option A is incorrect because energy gain alone doesn't confirm that mechanical work has occurred—it must involve displacement.

Option B is misleading; forces may act on a body, but without displacement, no work is done.

Option D is close, but too vague—movement alone isn't enough; it must be displacement caused by a force.

Therefore, Option C is correct because displacement is the essential condition for work to be done on a body.