## 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