" 4.State the conditions under which a force does no work? "

State the condition under which a force does not work.

State the condition under which a force does not work.

What is meant by zero work ? State the conditions under which a force does no work. Give any one example.

State the conditions under which the work done by a force is positive or negative.

Write three conditions under which work done is zero.

State the conditions under which Hooke’s law holds good.