# Friction Coefficient

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Friction coefficient, abbreviated as $$\mu$$, also called coefficient of friction, is the ratio between two contacting surfaces and the frictional force that resists the normal force of the object.

## Formulas that use Friction Coefficient

 $$\large{ \mu = \frac{F_a}{F_n} }$$

### Where:

$$\large{ \mu }$$  (Greek symbol mu) = friction coefficient

$$\large{ F_a }$$ = applied force

$$\large{ F_n }$$ = normal force