Mechanical Properties Of Fluids

• Buoyancy

  • Buoyant force = Up thrust by a fluid on a partially or fully immersed object is buoyancy or buoyant force. [Depends on fluid density]

  • Buoyant force = Weight of displaced liquid

  • Buoyant force = Volume of the object immersed in liquid × Density of the liquid × Acceleration due to gravity

  • This is the reason why an object immersed in water weighs comparatively lesser than its weight when it is outside water.

• Archimedes’ principle

  • Upward force experienced by a body immersed in fluid = Weight of the displaced fluid

  • Lactometer measures purity of milk

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