Question

What is the difference between angular momentum and linear momentum?

Answer 1

Angular momentum is inertia of rotation motion.
Linear momentum is inertia of translation motion.

The force related to rotation is `tau=F times r`
Angular momentum is `m v r`
The force related to linear movement is `F=(Delta P)/(Delta t)`
Linear momentum is `m v`
The big difference is that the type of motion which is related to each momentum is different.
It is important to consider the place where the force related to rotation applies, which is appears as 'r' in the formula.