1 / 8

Fluid Statics

Fluid Statics. Why do your ears hurt when you dive deep into a pool, and how can steel float on water?. Fluid statics: pressure and density. Pressure is Force/Area (N/m 2 = Pascals) A thumb tack is a good way to feel the difference between Force and pressure.

lumina
Download Presentation

Fluid Statics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Fluid Statics Why do your ears hurt when you dive deep into a pool, and how can steel float on water?

  2. Fluid statics: pressure and density • Pressure is Force/Area (N/m2 = Pascals) • A thumb tack is a good way to feel the difference between Force and pressure. • The atmosphere has a constant nominal pressure of 1.01 x 105 Pa (or 1 atm)

  3. Fluid Statics: Pressure and Density • Density ρ = mass/volume • ρ(water) = 1000 kg/m3 • ρ(aluminum) = 2700 kg/m3 • ρ(gold) = 19300 kg/m3

  4. Fluid Statics: change in pressure with increased depth • The deeper you dive into a pool the greater the pressure is. • Increased pressure Pgauge = ρgh = pressure due to the weight of the fluid at a given depth h. • The gauge pressure is the amount of increase in pressure compared to the surface (typically the surface pressure is atmosphere)

  5. Hydrostatic pressure • Pressure in a fluid • Pgauge = ρgh • P=Pgauge + Psurface • ( Psurface= Patm)

  6. Fluid Pressure increase with depth • The total pressure at a given depth is P=Pgauge + Psurface (where Psurface usually means Patm) • Fluid pressure depends on depth and not on the shape of the container.

  7. Buoyant Forces and Archimedes Principle (280 B.C. Greek scientist) • The buoyant Force pushing up by a fluid = weight of the fluid displaced • To calculate the weight of the fluid multiply the fluid density (ρ) by the displaced Volume and by g • Fbuoyant = ρVg = weight of the fluid

  8. Archimedes principle Buoyant force

More Related