What is Archimedes' principle?

Archimedes' principle states that when an object is immersed in a fluid, it experiences an upward buoyant force equal to the weight of the fluid that it displaces. This principle explains why objects float or sink in fluids, and is used to determine the buoyant force acting on an object in a fluid.

Archimedes' principle states that the upward buoyant force exerted by a fluid that opposes the weight of a partially or fully immersed object is equal to the weight of the fluid that the object displaces.

Mathematically, it can be expressed as:

Buoyant force = Weight of the displaced fluid

This principle was discovered by Archimedes, a Greek mathematician, physicist, and inventor in the 3rd century BC.