Moments of inertia for some objects of uniform density:
disk I = (1/2)MR 2, cylinder I = (1/2)MR 2, sphere I = (2/5)MR 2

(a) A uniform disk has a moment of inertia that is (1/2)MR2. A uniform disk of mass 13 kg, thickness 0.4 m, and radius 0.8 m is located at the origin, oriented with its axis along the y axis. It rotates clockwise around its axis when viewed from above (that is, you stand at a point on the +y axis and look toward the origin at the disk). The disk makes one complete rotation every 0.4 s.
What is the rotational angular momentum of the disk?
vectorlcap. gifrot = kg