## What is the formula for Coefficient of viscosity of a liquid?

Coefficient of viscosity of a liquid is defined as the viscous force acting per unit area between two adjacent layers of a liquid with a velocity gradient normal to the direction of flow of the liquid.

The formula for Coefficient of viscosity (η) of a liquid is given as,

where F= viscous force , A = Area , (dv/dx) = velocity gradient

η = F / A(dv/dx) .

SI unit of Coefficient of viscosity (η) of liquid is kg m^{-1} s^{-1}.