Lesson 21 Force due to liquid pressure revised (1)

# Lesson 21 Force due to liquid pressure revised (1) - Force...

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Force Due to Liquid Pressure The force F on an area A at a depth h in a liquid of density w is given by F = w h A The force will increase if the density increases, or if the depth increases or if the area increases. So if we have an unevenly shaped plate submerged vertically in a liquid, the force on it will increase with depth. Also, if the shape of the plate changes as we go deeper, we have to allow for this.
The force due to liquid pressure at the bottom of any two containers are equal since the bottom has the same areas and the depths of the liquid are equal. For a horizontal plate submerged in a liquid, the force due to liquid pressure is uniform throughout the plate For a vertical plate submerged in a liquid, the force is greater on the lower part due to the height.

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In integral form, whdA dF = In differential form, = b a hdA w F Where h is the distance of the element or the strip from the liquid surface.
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Lesson 21 Force due to liquid pressure revised (1) - Force...

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