Engineering Board Exam Reviewer · Fluid Mechanics · medium

The hydrostatic force on a submerged plane surface equals:

1. The pressure at the center of pressure times the area
2. The pressure at the bottom edge times the area
3. The pressure at the centroid times the area
4. The weight of liquid above the surface only for vertical surfaces

Answer

C. The pressure at the centroid times the area

Solution

F = hA, where h is the depth of the centroid.

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