# Stokes' Law

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Stokes' law, abbreviated as St, is the force that is put on a small sphere, slowing down the movement through a viscous fluid.

### Stokes' Law formula

$$\large{ F = 6 \; \pi \; r \; n \; v }$$

Where:

$$\large{ F }$$ = force

$$\large{ \pi }$$ = Pi

$$\large{ r }$$ = radius of sphere

$$\large{ v }$$ = velocity

$$\large{ n }$$ = viscosity

Tags: Equations for Force