Buoyancy is the force that causes objects to float. It is the force exerted on an object that is partly or wholly immersed in a fluid. Buoyancy is caused by the differences in pressure acting on opposite sides of an object immersed in a static fluid. It is also known as the buoyant force. Buoyancy is the phenomena due to Buoyant Force.
In general, the buoyancy force on a completely submerged object is given by the formula:
FB=Vρg
V = volume of the object,
ρ= density of the fluid and
g = gravitational acceleration.
Now as Object is Floating on the Liquid Two Forces are acting on it .
Now , as Liquid forces object upwards i.e BUOYANCY ,
it’s own Weight is pushing object downwards due to Gravitational Force ,
So its like both Forces are Competeing and exerts force to that object .
The Expression for Weight of an Object :
W=Vρo g
V = volume of the object,
ρo = density of the object and
g = gravitational acceleration.