An underwater gate 8 m wide is held closed by a force, F, as shown in the figure. If the force is applied at the middle of the gate, what is the minimum value required to keep the gate closed? take density of water= 996kg/m3

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A: P=7383.7N

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A: Given: b = 4 ft  d  = 6 ft W = 800 lbf h = 12 ft