15 ft 2 ft A

Question 2 In the schematic demonstrated in the figure, a spherical gate is used to regulate the height of water in a tank. The sphere radius is 50 cm and when the water height in the tank reaches 6 m, the gate opens by turning around hinge A. Determine the total hydrostatic force applied on the sphere and its angle of action at the moment that the gate is about to open. h=6 m R=50cm

How can I find the solutions for this problem? (answers are given) If a vertical triangular plate with (base=5 ft and height=12ft)  where its base is submerged by 12ft below the water's surface, determine the hydrostatic force and the location of the center of pressure. (answer: 23920 lbf and 15.6957 ft)

A 10000 litre water tank is placed on a building roof and filled to capacity.  The empty tank has a mass of 550kg.  It is supported on 4 feet, each of which is a 300 x 300 mm steel plate.  What is the pressure exerted by each plate, in Pa?  (Round your answer to 2 significant figures)