What is work energy theorem?
1 Answer
Aug 14, 2017
See below.
Explanation:
The work-energy theorem states that an increase in the kinetic energy of a (rigid) body is caused by an equal amount of positive work done on that body as a result of the net force acting on the body and vice versa.
#color(crimson)(DeltaE_"system"=DeltaK+DeltaU+DeltaE_"th"=W)#
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#W>0" "=># environment does work on the system and the system's energy increases -
#W<0" "=># system does work on the environment and the system's energy decreases
Much of the time (at least in lower-level physics classes or similar), we deal only with
#color(blue)(W_"friction"=DeltaK+DeltaU)#