Question

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 7.30 m/s as it tracks over the playing area.

1) What is the average angular acceleration of a Blu-ray disc as it plays an 6.0-h set of movies? (Assume the disk is scanned starting at its inner radius moving outward. Express your answer to two significant figures.) (ANSWER IN rad/s^2)

Answer 1