Hydrostatics Lab: Hydrostatic Pressure and Forces

P a g e | 1 Hydrostatics Lab: Hydrostatic Pressure and Forces John Felkins Abstract Hydrostatics offers physical explanations for many occurrences of everyday life, such as why atmospheric Pressure changes with altitude, why wood and oil float on water, and why the surface of water is always flat and horizontal whatever the shape of its container. In this lab, the center of Pressure and the force on a vertical rectangular surface partially, and then fully, submerged in water at rest were determined with an Edibon Hydrostatics Pressure System and set of weights with known masses. With the plate partially submerged, the centers of Pressure at separate (increasing) known weights were determined to be mm, mm, mm, mm, mm, mm, and mm with corresponding vertical Forces of N, N, N, N, N, N, and N respectively. Fully submerged, the centers of Pressure were determined to be mm, mm, mm, mm, mm, mm, mm, mm, mm, mm, and mm with calculated vertical Forces of N, N, N, N, N, N, N, N, N, N, and N respectively.

buoyancy force does not appear because the normal forces on the curved surface do not contribute a moment about the pivot of the device. This is due to the circular arc shape of the devices, because it allows us to measure the hydrostatic pressure forces without accounting for the buoyancy effect. Consider the moment balance depicted in Figure 4.

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  Pressure, Force, Hydrostatic pressure, Hydrostatic

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