summarise nitial Speed: When a CD player starts playing a disc, it spins the CD at a maximum speed of about 500 RPM to read the data efficiently. Constant Linear Velocity: As the CD plays, the rotation speed decreases as the laser reads from the inner tracks of the disc. This is due to the fact that CDs are designed to maintain a constant linear velocity (CLV), meaning that the speed of playback decreases as the laser moves closer to the center of the disc. Average Playback Speeds: While some sections might reach 500 RPM initially, the average rotational speed during playback usually hovers around 200 to 300 RPM, particularly as the disc progresses toward its end