Question

State the conditions under which a force does no work.....​

Answer 1

A force does no work when

the displacement is zero,

the displacement is perpendicular to the direction of the force, and

the conservative force moves a body over a closed path.

When the angle between the displacement and force applied is 90 degree i.e the force applied is perpendicular to the displacement. No work is said to be done if there is no change in position or no motion even after application of force.

Explanation:

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Answer 2

Answer:

Solution : (1) When force (F) and displacement (S) are mutually perpendicular then work done is zero . Even though force is applied if displacement is zero then work done W = 0 .