Practise Problems
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Now try the following for yourself!
1) Consider a 4m long, 4m wide and 1.5m high aboveground swimming pool that is filled with water to the rim.
(a) Determine the hydrostatic force on each wall and the distance of the line of action of this force from the ground
(b) If the height of the walls of the pool is doubled and the pool is filled, will the hydrostatic force on each wall double or quadruple? Why?
2) A room in the lower level of cruise ship has a 30cm diameter circular window. If the midpoint of the window is 5m below the water surface, determine the hydrostatic force acting on the window, and the pressure centre. Take the specific gravity of water to be 1.025
3) Consider a large cubic ice block floating in seawater. The specific gravities of ice and seawater are 0.92 and 1.025, respectively. If a 10-cm-high portion of the ice block extends above the surface of the water, determine the height of the ice block below the surface.