# Why is angular momentum perpendicular?

##### 1 Answer

Aug 7, 2015

#### Answer:

**Angular momentum** as you can tell from its name is related to the **rotation** of an object or a system of particles.

#### Explanation:

Having said that, we have to forget all about the linear and translational motion that we are so familiar with. Therefore, angular momentum is simply a quantity that shows rotation.

Look at the little curved arrow which shows angular velocity (likewise with angular momentum).

**The Formula***

We have a cross product for the 2 vectors which shows that angular momentum is perpendicular to the radial vector,