State two conditions when the work done by a force acting on a body is zero.
Answers:
(i) When there is no displacement by the force in the body.
(ii) When the displacement is normal to the direction of force.
State two conditions when the work done by a force acting on a body is zero.
(i) When there is no displacement by the force in the body.
(ii) When the displacement is normal to the direction of force.