Buoyancy

(noun)

The power of supporting a body so that it floats; upward pressure exerted by the fluid in which a body is immersed.

Related Terms

  • torque
  • equilibrium

Examples of Buoyancy in the following topics:

  • Complete Submersion

    • The buoyancy force on a completely submerged object of volume is $F_B = V \rho g$ .
    • In general, the buoyancy force on a completely submerged object is given by the formula:
    • The buoyancy force on the cylinder is equal to the weight of the displaced fluid.
    • The buoyancy force on an airship is due to the air in which it is immersed.
    • Identify factors determining the buoyancy force on a completely submerged object
  • Buoyancy and Archimedes' Principle

    • The reasoning behind the Archimedes principle is that the buoyancy force on an object depends on the pressure exerted by the fluid on its submerged surface.
    • The buoyancy force on this amount of fluid must be the same as on the original object (the ship).
    • However, we also know that the buoyancy force on the fluid must be equal to its weight, as the fluid does not sink in itself.
    • Therefore, the buoyancy force on the original object is equal to the weight of the "displaced fluid" (in this case, the water inside the dashed region (b)).
  • Flotation

    • An object floats if the buoyancy force exerted on it by the fluid balances its weight.
    • An object will float if the buoyancy force exerted on it by the fluid balances its weight, i.e. if $F_B = mg$.
    • Express the relationship between theĀ buoyancy force and the weight for a floating object
  • Weight

    • In this case, the weight of the object varies due to the force of buoyancy.
  • Static Equilibrium

    • This force which counteracts the weight of a region or object within a static fluid is called the buoyant force (or buoyancy).
  • Geomagnetism

    • The motion of the molten outer iron core is sustained by convection, or motion driven by buoyancy.
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