As stated by Archimedes, Buoyancy is the upward force experienced by the body when it is partially or fully immersed in the liquid. It is the upward force exerted by the liquid. The symbol of Buoyancy is B or FB.
It is a vector quantity and has both magnitude and direction. The unit of buoyancy is Newton [N]. Buoyancy is caused due to the change in pressure. The pressure is higher at the bottom of the object and decreases as we go up. The pressure at the bottom pushes the object up and the pressure above pushes it down. The net force due to the object acts upwards.
A popular example of Buoyancy is the ship floating in the water.
Buoyant Force in terms of Pressure
Buoyant force Fb, in terms of pressure, is written as
Fb =F2 -F1
F2 = force acting upwards
F1 = force acting downwards
P = Pressure and
A = Area
In terms of Area Height and Volume, it is given by
ρ is the density of the fluid is ρ
g is the gravity
V is the volume of the immersed part of the body in the fluid
h is the height of the immersed part
A is the area