A disk of mass m is spinning freely at 6.22 rad/s when a second disk of identical mass, initially not spinning, is dropped on it so that their axes coincide. In a short time the two disks are corotating. (The two disks have the same radius.)

Question

(a) What is the angular speed of the new system?
rad/s

(b) If a third such disk is dropped on the first two, find the final angular speed of the system.
rad/s

Answer 1

a) 2.34 rad/s
b) .94 rad/s

Answer 2

Note: I might not be correct, but I did put more work into this answer by just making up answers than you did in the post.