(Force on plane surface) The rectangular gate CD of the figure below is 1.8 m wide and 2.0 m long. Assuming the material of the gate to be homogeneous and neglecting friction at the hinge C, determine the weight of the gate necessary to keep it shut until the water level rises to 2.4 m above the hinge. Water 2.4 m Hinge 3 2.0 m

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