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The net forces of acting on the body need to be zero. This is also applicable for the bodies having some potential energy. This means that the work done over it is saved in the form of potential energy.

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The net forces of acting on the body need to be zero. This is also applicable for the bodies having some potential energy. This means that the work done over it is saved in the form of potential energy.

(a) True

(b) False

This question was posed to me at a job interview.

My question comes from Potential Energy in division Principle of Virtual Work of Engineering Mechanics

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Correct choice is (a) True

Explanation: The support reactions of the beam is also counted in the making of the forces zero. As far as the net force is concerned the support reaction does affect the conditions for the equilibrium of the body. Hence one needs to take care of the support reactions of the beam too.

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