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# There will be an increase in potential energy of the system if work is done upon the system by

a) any conservative or non-conservative force

b) A conservative force

c) A non-conservative force

d) None of the above

Potential energy is related to only conservative forces.
A conservative force is a force with the property that the work done in moving a particle between two points is independent of the taken path.
The concept on a conservative force applies to potential energy. Potential energy is associated with forces that act on a body in a way that depends only on the body's position in space.
Forces derivable from a potential are also called conservative forces.
edited Aug 25, 2014