Compute the combined moment of the two 90-lb forces about (a) point O and (b) point A. The moment is positive if counterclockwise, negative if clockwise. Assume a = 6.2 in., b = 2.7 in., F = 90 lb. F. F Answers: (a) Mo = i Ib-in. (b) MA = i Ib-in.

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