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Fluids PMHSPearson2007. Archimedes' Principle The buoyant force on a submerged object is equal to the weight of the fluid displaced. The buoyant force.

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Presentation on theme: "Fluids PMHSPearson2007. Archimedes' Principle The buoyant force on a submerged object is equal to the weight of the fluid displaced. The buoyant force."— Presentation transcript:

1 Fluids PMHSPearson2007

2 Archimedes' Principle The buoyant force on a submerged object is equal to the weight of the fluid displaced. The buoyant force on a submerged object is equal to the weight of the fluid displaced.buoyant forcebuoyant force

3 What Is Pressure?

4 Static Fluid Pressure The pressure exerted by a static fluid depends only upon the depth of the fluid, the density of the fluid, and the acceleration of gravity.

5 Pascal’s Principle Pressure is transmitted undiminished in an enclosed static fluid. Pressure is transmitted undiminished in an enclosed static fluid. Any externally applied pressure is transmitted to all parts of the enclosed fluid, making possible a large multiplication of force (hydraulic press principle). The pressure at the bottom of the jug is equal to the externally applied pressure on the top of the fluid plus the static fluid pressure from the weight of the liquid. Any externally applied pressure is transmitted to all parts of the enclosed fluid, making possible a large multiplication of force (hydraulic press principle). The pressure at the bottom of the jug is equal to the externally applied pressure on the top of the fluid plus the static fluid pressure from the weight of the liquid.hydraulic press principlestatic fluid pressurehydraulic press principlestatic fluid pressure

6

7 A multiplication of force can be achieved by the application of fluid pressure according to Pascal's principle, which for the two pistons impliesforcepressurePascal's principle P1 = P2 This allows the lifting of a heavy load with a small force, as in an auto hydraulic lift, but of course there can be no multiplication of work, so in an ideal case with no frictional loss:auto hydraulic liftwork Winput = Woutput

8 Do Fluids Contain Energy? Kinetic Energy By Volume Potential Energy By Volume

9 Bernoulli Equation


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