Fluids at rest.pdf

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Calculating Buoyant ForceThe buoyant force F B is due tothe difference of pressure Pbetween the top and bottomsurfaces of the submerged block.FBP P2 P1; FB A( P2 P1)AF A( P P ) A( gh gh )B 2 1 f 2 f 1F ( g) A( h h); V A( h h)B f 2 1 f 2 1AreaF Bmgh 1h 2Buoyant Force:V f is volume of fluid displaced.F B = f gV f
Example 4: A 2-kg 2brass block is attached toa string and submerged underwater. Find thebuoyant force and the tension in the rope.All forces are balanced:F B + T = mg F B = w gV w3bmbmb ; Vb V bb2 kg8700 kg/mV b = V w = 2.30 x 10 -4 m 3F b = (1000 kg/m 3 )(9.8 m/s 2 )(2.3 x 10 -4 m 3)F B = 2.25 NTmgF B = gVForcediagram
Page 1 and 2: Chapter 15A - Fluids at RestA Power
Page 3 and 4: Objectives: After completing thismo
Page 5 and 6: Example 1: The density of steel is
Page 7 and 8: PressurePressure is the ratio of a
Page 9 and 10: Fluid PressureA liquid or gas canno
Page 11 and 12: Pressure vs. Depth in FluidPressure
Page 13 and 14: Properties of Fluid Pressure• The
Page 15 and 16: Atmospheric PressureOne way to meas
Page 17 and 18: Pascal’s s LawPascal’s Law: An
Page 19: Archimedes’ Principle• An objec
Page 23 and 24: Floating objects:When an object flo
Page 25 and 26: Problem Solving Strategy1. Draw a f
Page 27 and 28: Problem Strategy (Cont.)6. 6. For a
Page 29 and 30: Summary (Cont.)Pascal’sLaw:FAinin

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