When a body is in water, it displaces some amount of water owing to its weight. The amount of displaced water is computed by object’s density which relates to volume. The volume of a cricket ball and beach ball can be same their different weight their density differs. The steel solid block descends in water but the steel ship does not. Therefore, the quantity of displaced water in the upward direction is elucidated in terms of buoyant force. Let’s discuss the buoyancy force and its formulation with diverse devices grounded on it.

What is Buoyancy?

When we submerge an object in a fluid, an upward force is experienced by the object. This force is applied by the fluid on the object which makes it to, rise up and is called the Force of Buoyancy. The scale of this force is precisely equal to the amount or weight of the liquid displaced.

Buoyancy Definition: The upward force applied by the fluid on the object or the body when an object is put in or submerged in the fluid is termed as Buoyancy.


The point where the force of Buoyancy is applied or the point on the object where the force acts is termed as the Centre of Buoyancy. It should be illustrated that the force of buoyancy is a vertical force, and thus, the Centre of Buoyancy is the point situated on the centre of the gravity of the liquid that is being displaced by the object submerged.

Buoyant Force: If one considers a single column of liquid, then it can be considered as a concoction of the many overlying layers, one over the other with fluctuating pressure. The pressure at the bottom of the liquid would be greater than at the top; this is for the reason that as we go down in the liquid the number of layers of the liquid that are overlying i.e. the layers one over the other, increases.

Owing to the difference in the pressure amid the layers, there tends to be a made-up force being applied on it in the upward direction. This force leads to the acceleration of the object that has been submerged, in the upward direction. The force is always in the vertical direction.

It can also be said that the magnitude of the upward force is basically equivalent to the difference in the pressure of the topmost and the last layer and also equivalent to the weight of the fluid that has been displaced.

Floating is the consequence of the above concept. The object should be less dense than water, or else, if its density is greater, it will have a tendency to sink.