8. A uniform fiat disk of mass M and radius R rotates about a horizontal axis through its center with angular speed o.
(a) What is its angular momentum?
(b) A chip of mass m breaks off the edge of the disk at an instant such that the chip rises vertically above the point at which it broke off (Fig. 10-29).
How high above the point does it rise before starting to fall?
(c) What is the final angular speed of the broken disk?