Final answer:
The hydrostatic force on the top of the cube can be calculated using the weight of the water above the cube and the area of the top surface.
Step-by-step explanation:
The hydrostatic force on the top of a cube can be calculated using the equation F = P * A, where F is the force, P is the pressure, and A is the area of the top surface. In this case, the pressure is equal to the weight of the water above the cube divided by the area of the top surface.
The weight of the water can be calculated using the formula W = m * g, where W is the weight, m is the mass, and g is the acceleration due to gravity. The mass of the water can be found using the formula density = mass/volume. Rearranging the equation, mass = density * volume. The volume of the water can be determined by multiplying the depth of the water by the area of the top surface.
Finally, the area of the top surface of the cube is equal to the length of one side squared. Plugging all the values into the equation, we can calculate the hydrostatic force on the top of the cube.