Fluid Mechanics - Air Pressure/ Prism

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hawaiifiver
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Hello

How would you calculate the total force (due to air pressure) on the top face of a prism, which is partially immersed in water? The top face is horizontal. What formula do you use?

Thank you.
 
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Force equals pressure times area. The pressure to use would be whatever the local pressure is. More information is needed from you to determine what the local pressure is.
 

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