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Potential energy of a particle along x-a...

Potential energy of a particle along x-axis varies as U = - 30 + `(X-2)^2`, where U is in joule and x is in meter. Hence the particle is in

A

Stable equilibrium at x = 0

B

Stable equilibrium at x = 2 m

C

Unstable equilibrium at x = 2 m

D

Neutral equilibrium

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