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Q:

If the given forces P?, P?, P?, P?,and P? which are co planar and concurrent are such that the force polygon does not close, then the system will

A) Be in equilibrium B) Always reduce to a resultant force
C) Always reduce to a couple D) Always be in equilibrium and will always reduce to a couple
 
Answer & Explanation Answer: B) Always reduce to a resultant force

Explanation: For a system to be in equilibrium force polygon and funicular polygon must close. If the force polygon does not close then the forces will reduce to a resultant force. If funicular polygon does not close, then there is resultant moment on the system.

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