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On being displaced, the centre of mass of unstable equilibrium goes ___________

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On being displaced, the centre of mass of unstable equilibrium goes ___________

(a) Higher

(b) Neither higher nor lower

(c) First higher and then lower

(d) Lower

This question was posed to me in my homework.

I need to ask this question from Centripetal Force in chapter Kinematics of Engineering Physics I

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Right choice is (d) Lower

To elaborate: A body is said to be in unstable equilibrium if it gets further displaced from its equilibrium position after being slightly displaced and released. In unstable equilibrium, a body possesses maximum potential energy and its centre of mass goes lower on being slightly displaced.

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