# A cylinder has inner and outer radii of #4 cm# and #7 cm#, respectively, and a mass of #6 kg#. If the cylinder's frequency of counterclockwise rotation about its center changes from #15 Hz# to #11 Hz#, by how much does its angular momentum change?

##### 1 Answer

Mar 20, 2017

#### Answer:

The change in angular momentum is

#### Explanation:

The angular momentum is

where

For a cylinder,

So,

The change in angular momentum is

The change in angular velocity is

The change in angular momentum is