The outside diameter of the playing area of an optical Blu-ray disc is 11.75 cm, and the inside diameter is 4.50 cm. When viewing movies, the disc rotates so that a laser maintains a constant linear speed relative to the disc of 7.50 m/s as it tracks over the playing area.
(a) What are the maximum and minimum angular speeds (in rad>s and rpm) of the disc?
(b) At which location of the laser on the playing area do these speeds occur?
(c) What is the average angular acceleration of a Blu-ray disc as it plays an 8.0-h set of movies?
