## Buoyancy

**Archimedes Principle**

Any body immersed in a fluid is subjected to an upward force called buoyant force equal to the weight of the displaced fluid.

*Archimedes (287-212 B.C.)*

$BF = \gamma V_D$

Where

$BF$ = buoyant force

$\gamma$ = unit weight of fluid

$V_D$ = volume of fluid displaced by the body

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