A long solid cylinder(R = 0.8 m) hinged at point A is used as an automatic gate. When the water level reaches 5 m, the gate opens by turning about the hinge at point A.
(a) Determine the hydrostatic force acting on the cylinder and its line of action when the gate opens.
(b) Determine the weight of the cylinder per m length of the cylinder. (density of water = 1000 kg/m3 and g = 9.81 m/s2)