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In 3D the body will be improperly constrained if the axis is intersected by the reaction forces.

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In 3D the body will be improperly constrained if the axis is intersected by the reaction forces.

(a) The statement is right

(b) The statement is wrong

(c) The statement is right if there is ‘2D’

(d) The statement is right if there is ‘support reaction’

This question was posed to me during an online interview.

My enquiry is from Constraints and Statical Determinacy topic in section Equilibrium of a Rigid Body of Engineering Mechanics

1 Answer

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Correct answer is (a) The statement is right

For explanation: In 3D the body will be improperly constrained if the axis is intersected by the reaction forces. This is because there will be small moments which will occur in the real situations. But they will not be matched in the calculations done for determining the equilibrium. Thus the statement is right.

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