Stokes' Law

Stokes' Law

### Formula

$$F=6\pi\eta rv$$

### Terminologies

- F → Viscous drag force.

- η → Coefficient of viscosity.

- r → Radius of sphere.

- v → Velocity of sphere.

### Conditions / Special Cases

Applicable for:

- Small spherical objects.

- Low velocity motion.

### Usage

- Used in terminal velocity problems.