# Momentum

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Momentum, also known as linear motion or translational momentum, of an object is the amount of mass in motion.  Momentum is a vector quantity having magnitude and direction, some of these include acceleration, displacement, drag, force, lift, thrust, torque, velocity, and weight.  The change in momentum is called impulse.

### Momentum Formula

$$\large{ p = m v }$$

Where:

$$\large{ p }$$  = momentum

$$\large{ m }$$ = mass

$$\large{ v }$$ = velocity

## Momentum diffusion

Momentum diffusion also known as diffusion, or spread of momentum between particles (atoms or molecules) of matter, often in the liquid state. In fluids, this is caused by viscosity.