# A solid disk, spinning counter-clockwise, has a mass of #4 kg# and a radius of #7 m#. If a point on the edge of the disk is moving at #8 m/s# in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?

##### 1 Answer

Oct 30, 2016

The angular momentum is

The angular velocity is

#### Explanation:

Let's start by calculating the angular velocity

we use the equation

and

The moment of inertia of the solid disc

So

Then the angular momentum is

so,