Question

Write another name of buoyant force.

Answer 1

Hint:Buoyant force is based upon the principle of Archimedes’. Archimedes’ principle states that the upward buoyancy force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces.

Complete answer:
First, Let us understand the basic concept of Buoyant force. It’s an upward force exerted by the fluid that opposes the weight of the body which is partially or fully immersed in the liquid. In fluids, pressure increases with depth as a result of the weight of the overlying fluid.Thus, pressure at the bottom of the fluid column is greater than at top of column.

Similarly, pressure at the bottom of an object submerged in fluid is greater than at top of the object. This pressure difference results in a net force on the body which is governed by Archimedes’ principle and is equal to the weight of the fluid that would otherwise occupy the submerged volume of the object.
Buoyant force $ = $ weight of an object in empty space $ - $ weight of object immersed in fluid.

Hence,the buoyant force is also known as upthrust force and this phenomenon is sometimes referred as Buoyancy.

Note:We should also know that Buoyancy is the main reason for an object whose average density is greater than that of the fluid in which its submerged tends to sink and if it’s less dense than the liquid object tends to float on the surface of fluid. The centre of buoyancy of an object is the centre of gravity of the displaced volume of fluid.