Select the correct alternative.

Options

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

D

Explanation

`N//A`