# A cylinder has inner and outer radii of #12 cm# and #18 cm#, respectively, and a mass of #6 kg#. If the cylinder's frequency of rotation about its center changes from #4 Hz# to #8 Hz#, by how much does its angular momentum change?

##### 1 Answer

Feb 26, 2017

The change in anglar momentum is

#### Explanation:

The angular momentum is

where

For a cylinder,

So,

The change in angular momentum is