Question
The force acting on a body moving along axis varies with the position of the particle as shown in the fig
The body is in stable equilibrium at


 Both and
 Neither nor
The correct answer is:
When particle moves away from the origin then at position force is zero and at , force is positive (repulsive in nature) so particle moves further and does not return back to original position the equilibrium is not stable Similarly at position force is zero and at , force is negative (attractive in nature) So particle return back to original position the equilibrium is stable
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