Question

PLEASE EXPLAIN THIS
The upthrust acts on the body in upward
direction at the centre of buoyancy i.e., the
centre of gravity of the displaced fluid.​

Answer 1

Explanation:

The up upthrust or buoyant force in upward direction is equal to weight of displaced fluid I hope it helps you.

Answer 2

Answer:

the centre of gravity of the displaced liquid)

Explanation:

For a uniform body completely immersed inside a liquid, the centre of buoyancy coincides with the it, causing centre of gravity of the body . But if a body floats in a liquid with only a part of it submerged, the centre of buoyancy B is at the centre of gravity of the displaced liquid (i.e., at the centre of gravity of the immersed part of the body) which lies below the centre of gravity G of the entire body. The weight of the body W acts downwards at G, while upthrust FB upwards at B such that W = F B