Define the resultant hydrostatic force acting on a submerged surface, and the center of pressure.

You may have noticed that dams are much thicker at the bottom. Explain why dams are built that way.

A $50-cm imes 30-cm imes 20-cm$ block weighing 150 N is to be moved at a constant velocity of 0.80 m/s on an inclined surface with a friction coefficient of 0.27. (a) Determine the force F that needs to be applied in the horizontal direction. (b) If a 0.40-mm-thick oil film with a dynamic viscosity of $0.012 Pa\cdot s$ is applied between the block and inclined surface, determine the percent reduction in the required force.

Someone claims that she can determine the magnitude of the hydrostatic force acting on a plane surface submerged in water regardless of its shape and orientation if she knew the vertical distance of the centroid of the surface from the free surface and the area of the surface. Is this a valid claim? Explain.

Consider a submerged curved surface. Explain how you would determine the vertical component of the hydrostatic force acting on this surface.

A three-dimensional figure has a rectangular vertical cross section and a horizontal cross section in the shape of a hexagon. What is the three-dimensional figure?