Q. The potential energy of a system increases if work is done
A) Upon the system by a conservative force
B) Upon the system by a non-conservative force
C) By the system against a conservative force
D) By the system against a non-conservative force
Explanation
[Solution from source] Potential energy is defined only for conservative forces: ΔU = −W(conservative). When the system does work against a conservative force (the conservative force does negative work), its potential energy increases. Work by non-conservative forces does not change potential energy. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.