(i) A sealed lightweight plastic cube of sides 0.75m is submerged under water, as shown in Figure Q3a. Find the net hydrostatic forces acting on the cube.\n[8]\n(ii) If the cube is lowered further in the water, what effect does this have on the hydrostatic forces?\n[1]\n(iii) If the cube must be maintained in the location shown in Figure Q3a using a rope tied to a concrete block, what volume of concrete is required?\n[1]\n(Note: acceleration due to gravity g=9.81(m^(2))/(s); water density \\rho =1000k(g)/(m^(3)); concrete density \\rho =2400k(g)/(m^(3)) )\nFigure Q3a
(a)
(i)A sealed lightweight plastic cube of sides 0.75m is submerged under water, as shown in Figure Q3a. Find the net hydrostatic forces acting on the cube. [8]
(ii)If the cube is lowered further in the water, what effect does this have on the hydrostatic forces? [1]
(iii) If the cube must be maintained in the location shown in Figure Q3a using a rope tied to a concrete block,what volume of concrete is required? [1]
(Note: acceleration due to gravity g=9.81 m2/s; water density p = 1000 kg/m3; concrete density p=2400 kg/m3)
Water surface
Figure Q3a
