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Questions  

Gravitational force is a central force which is always conservative. Which of the following forces is noncentral and conservative in nature?

a
Electrostatic force
b
Magnetic force on a free charge particle
c
Spring force
d
Force due to friction

detailed solution

Correct option is C

The spring force is represented by F→=-kx→, which is non central. But the work done in a round trip under this force field will be zero. Hence it is conservative.

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