Give an example of motion in which the force does no work.

Give one example of a motion in where an object does not changes its speed but its direction of motion changes continuously.

Give example of a situation in which an applied force does not result in a change in kinetic energy.

Give an example in which a force does work on a body but fails to change its Kinetic energy.

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

Give an example of contact force.

Give one example each in which a force does (a) positive work (b) negative work and (c ) zero work.

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

Give examples of Rotatory motions.