Help needed!! "angular speed question" for the physics pros?

Question

I can't figure this one out

A uniform meter stick with a mass of 135g rotates about an axis perpendicular to the stick passing through the center of the stick with an angular speed of 3.50 rad/s^2. What is the magnitude of the angular momentum of the stick?

I think we us I=(1/12)MR^2 since its a rod. I also want to know if I use .5m or 1m for the Radius. Thanks

Answer 1

The formula applies to a rod of length l spun on an axis through the center.  So l is 1, and the angular momentum is 1/12 x 135 x 3.50.  But there is a problem with the speed shown: that is an angular acceleration, not an angular velocity: it has to be 3.5 radians/second.

Answer 2

1