Assertion : A work done in moving a body over a closed loop is zero for every force in nature. Reason : Work done does not depend on nature of force.

Assertion: Work done by the force of friction in moving a body around a closed loop is zero. Reason: Work done does not depend upon the nature of force.

Work done in moving a body over a closed loop in zer'. Is this statement true for all forces?

State if each of the following statements is true or false. Give reasons for your answer. a) In an elastic collision of two bodies, the momentum and energy of each body is conserved. b)Total energy of a systm is always conserved,no matter what internal and external forces on the body are present. Work done in the motion of a body over a closed loop is zero for every force in nature. d) In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the sytem.

The work done on an object does not depend on the :

True / False type questions : It is necessary that the work done in the motion of a body over a closed loop is zero for every force in nature.

Assertion : It is possible that work done by a force on an object is different for different observes . Reason : Work done by a force depends on frame of reference of observer .

Does the work done in moving a body depend on the time in which the work is done ?