Question

Frictional force between layers of flowing fluid is known as

• A. Viscosity.
• B. Surface tension.
• C. Gravity.
• D. None of these.

Answer 1

The correct option is A

Viscosity.

Viscosity is often referred to as the thickness/compactness of a fluid. At molecular level, viscosity is a result of the interaction between different molecules in a fluid. This can also be understood as friction between different layers in a fluid.