The square gate, shown in Figure P4.10, is hinged at A and separates the water in the reservoir from the water in the tunnel. If the gate has dimensions of 3 m X 3 m and weighs 15 t-m/s2 , what is the...

The square gate, shown in Figure P4.10, is hinged at A and separates the water in the reservoir from the water in the tunnel. If the gate has dimensions of 3 m X 3 m and weighs 15 t-m/s2 , what is the maximum height, h, such that the gate will remain closed?