Enter the viscosity and density of a fluid and the density and diameter of a particle into the calculator to determine the object’s terminal velocity.

## Stokes’ Law Formula

The following equation is used to calculate the terminal velocity of an object.

v = g * d^2 * (P – p) / (18 * u)

• Where v is the terminal velocity
• g is the acceleration due to gravity
• d is the diameter of the particle
• P is the density of the particle
• p is the density of the fluid
• u is the viscosity of the fluid

## Stokes’ Law Definition

Stokes’ law is defined as the terminal velocity of a falling object through a specific fluid or medium.

## Stokes’ Law Example

How to calculate Stoke’s Law?

1. First, determine the diameter of the particle.

Calculate the diameter of the particle.

2. Next, determine the density of the particle.

Calculate the density of the particle.

3. Next, determine the density of the fluid.

Calculate the density of the fluid.

4. Next, determine the viscosity of fluid.

Calculate the viscosity of the fluid.

5. Finally, calculate the terminal velocity.

Calculate the terminal velocity using Stokes’ Law.

## FAQ

What is Stokes’ Law?

Stokes’ law describes the terminal velocity an object can reach due to gravity and the properties of the particle and medium it’s moving through.

How is Stokes’ Law Calculated?

Stokes law is calculated using the properties of the particle and fluid with the formula above.