Question
What do you understand by buoyancy and centre of buoyancy?
Solution
The upward force acting on a body immersed in a fluid is called upthrust or force of buoyancy and the phenomenon is called buoyancy.
When a body is immersed partially or wholly in a fluid, it displaces fluid. The displaced fluid tends to regain its original condition. Durig this time, it exerts an upward force on the body which is called as Buoyancy.
For example, a cork taken inside water comes to the surface after experiencing an upward thrust.
The buoyancy acts through the centre of gravity of the displaced fluid which is called centre of buoyancy.
