Select the correct alternative.A. Work done by kinetic friction on a body always results in a loss of its kinetic energy.B. Work done on a body, in the motion of that body over a close loop is zero for every force in nature.C. Total mechanical energy of a system is always conserved no matter what type of internal and ecternal forces on the body are present.D. When total work done by a conservative force on the system is positive then the potential energy associated with this force decreases.

Select the correct alternative.A. Work done by kinetic friction on a b

1.	Select the correct alternative.A. Work done by kinetic friction on a body always results in a loss of its kinetic energy.B. Work done on a body, in the motion of that body over a close loop is zero for every force in nature.C. Total mechanical energy of a system is always conserved no matter what type of internal and ecternal forces on the body are present.D. When total work done by a conservative force on the system is positive then the potential energy associated with this force decreases.
Answer» Correct Answer - D

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