Question

Fill in the blank:

The upward force experienced by a solid when partially or wholly immersed in a fluid is called ________.

• A. weight
• B. viscous force
• C. buoyant force
• D. none

Answer 1

The correct option is C buoyant force

A solid experiences a force in upward direction when immersed in liquid, equal in magnitude to the weight of the liquid displaced by the solid, called the buoyant force.

Mathematically $B=V\rho g$

where $V$ is the volume of solid immersed in water

and $\rho$ is the density of the liquid.