1. Identify the system and ensure it's closed (no external forces). 2. Write down the initial momentum of all objects in the system. 3. Write down the final momentum of all objects in the system. 4. Set the total initial momentum equal to the total final momentum: $\vec{p}_{initial} = \vec{p}_{final}$. 5. Solve for the unknown quantities.

1. Identify the system and ensure it's closed (no external forces). 2. Write down the initial momentum of all objects in the system. 3. Write down the final momentum of all objects in the system. 4. Set the total initial momentum equal to the total final momentum. $\vec{p}_{initial} = \vec{p}_{final}$. 5. Solve for the unknown quantities.

Measure of an object's motion, combining mass and velocity. $\vec{p} = m\vec{v}$

$\vec{p} = m\vec{v}$ where $\vec{p}$ is momentum (kg⋅m/s), $m$ is mass (kg), and $\vec{v}$ is velocity (m/s).

kilogram-meters per second (kg⋅m/s)

A collision where both momentum and kinetic energy are conserved.

A collision where momentum is conserved, but kinetic energy is not. Some energy is lost to heat, sound, etc.