# A solid disk, spinning counter-clockwise, has a mass of #7 kg# and a radius of #3 m#. If a point on the edge of the disk is moving at #16 m/s# in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?

##### 1 Answer

Jun 2, 2016

For a disc rotating with its axis through the centre and perpendicular to its plane, the **moment of inertia** , ** #I =1/2MR^2#**

So, the Moment of Inertia for our case,

where,

the angular velocity (

So, the Angular velocity (

Hence, the Angular Momentum =