Question

12. The force acting tangential to the layers of the liquid is called:
1) Buoyant force
2) Viscous drag
3) Frictional force
4) Gravitational force​

Answer 1

Viscous force

It is the force which opposes the relative motion between two adjacent liquid layers. It is acting tangential to the layers of the liquid. $\quad$

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The force acting upwards on a body by the liquid when it is immersed in the liquid is called buoyant force.

Similar to viscous force, the force which opposes the relative motion between two contact surfaces is called frictional force.

The mutual attractive force acting between two bodies is called gravitational force.