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lecture23_post - Fluids statics and dynamics Pressure The...

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Fluids: statics and dynamics
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Pressure The force exerted by a fluid on a submerged object at any point if perpendicular to the surface of the object 2 m N Pa in A F P
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Density The density of a substance of uniform composition is defined as its mass per unit volume: Units are kg/m 3 (SI) or g/cm 3 (cgs) 1 g/cm 3 = 1000 kg/m 3 m V
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Pressure 2 m N Pa in A F P
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V=Ah Pressure and Depth Examine the darker region, assumed to be a fluid It has a cross- sectional area A Extends to a depth h below the surface Three external forces act on the region A Balance them: P 2 A-P 1 A=Mg=( V)g h P 2 -P 1 = gh
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Pressure and Depth equation P o is normal atmospheric pressure 1.013 x 10 5 Pa The pressure does not depend upon the shape of the container
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h 1.P atm 2.Unknown pressure P A What is the pressure at point A? In class Quiz #24-1 P
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