1. The problem statement, all variables and given/known data The inner and outer radii of a compact disc are 25 mm and 58 mm. As the disc spins inside a CD player, the track is scanned at a constant linear speed of 1.25m/s. The maximum playing time of a CD is 74.0 min. What is the average angular acceleration of a maximum-duration CD during its 74.0-min playing time? Take the direction of rotation of the disc to be positive. 2. Relevant equations v=wr angular acceleration=rw^2 3. The attempt at a solution I tried to integrate wr somehow, but w is not constant.