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A freshwater marsh is drained to the ocean through anautomatic tide gate that is 4 ft wide and 3 ft high.The gateis held by hinges located along its topedge at A and bears on asill at B.At a given time, the water levels in the marsh andin the ocean are h = 6 ft and d = 9 ft, respectively. Determine theforce exerted by the sill on the gate at B and thehinge reaction at A. (Specific wight of salt water = 64lb/ft^3.)The Answers are:B = 1200lb to the right,A = 1190 lb to the right.
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