Problem 61P
Consider a submerged curved surface. Explain how you would determine the vertical component of the hydrostatic force acting on this surface.
Step 1:
To determine the vertical component of the hydrostatic force acting on the submerged surface
Consider a submerged curved surface of fluid. The vertical component of the net force is shown in the diagram. The vertical component of the hydrostatic force equals to the sum of two forces. They are the weight (W) acting downward at the center of mass of the curved fluid section and the force (F1) applied by the top surface of the fluid (horizontal projection).
FV = W + F1
Here F1 is the weight of the fluid above the horizontal projection