# Kinetic Friction Coefficient

Kinetic friction coefficient, abbreviated as \(\mu_k\), is a dimensionless number, also called coefficient of kinetic friction, is the amount of force that resists motion at a constant velocity.

### Kinetic Friction Coefficient FORMULA

\(\large{ \mu_k = \frac {f_k}{F_n} }\)

Where:

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

\(\large{ f_k }\) = kinetic friction

\(\large{ F_n }\) = normal force