Question

The centre of _________ is a point, where the total upthrust, due to fluid displaced by _________ part of body acts.

• A. buoyancy
• B. immersed

Answer 1

1. According to Archimedes' principle, when a body is immersed in liquid then an upward force called buoyant force acts on the body which is equal to the weight of the liquid displaced.
2. The centre of gravity of the volume of displaced fluid when an object is immersed in the fluid is called the centre of buoyancy.

Hence, the centre of buoyancy is a point, where the total upthrust, due to fluid displaced by immersed part of the body acts.