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I know how to calculate the resultant moments and forces but in the solution, it says to turn into a force couple system at point G, and then solve for where the resultant should be on the line FG, and then GH.
My question is, what is the question even saying in the first place when it states that the rivet cannot withstand a couple. Isn't a couple a pair of parallel forces that produces motion? And as a result I don't understand what the solution means.