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If solving the question in 3D calculations is difficult, then use the 2D system and then equate the total net force to zero as the criteria of the potential energy for equilibrium.

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If solving the question in 3D calculations is difficult, then use the 2D system and then equate the total net force to zero as the criteria of the potential energy for equilibrium.

(a) True

(b) False

The question was asked in examination.

The origin of the question is Potential Energy Criterion for Equilibrium in portion Principle of Virtual Work of Engineering Mechanics

1 Answer

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Right answer is (a) True

Easiest explanation: The answer is obviously yes. If we are having any difficulty in making the vector components, then we can go in 2D. As if the particle is in equilibrium, the net force will be zero. No matter where you see first. Net force is zero.

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