Q. In order to achieve stability, the sum of secondary forces and secondary couples must be ------- and their respective polygons must be …......

(A) Zero, Closed
(B) one, Open
(C) Zero, open
(D) one, closed

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✅ Correct Answer: (A) Zero, Closed

Published by Mr. Dubey ⭐ 104.82K Points at 16-Sep-2023 04:09 pm in Dynamics of Machinery

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