[[Physics]]
Linear momentum: $$\vec p=m\vec v$$
$\vec p$ is momentum in kg * m/s

# Summary
* Momentum: $\vec p=m\vec v$
* It's a vector
* Doubling either mass or velocity doubles momentum
* In one dimension, assign positive and negative signs
* Collision is an interaction where forces between objects are much larger than net external force on system
* Explosion is interaction where internal forces push parts of a system apart