Question

In a cd player, the speed of the surface of the cd at the point where the laser is reading the cd must be a constant 1.30 m/s. The cd needs to vary angular speed as the laser reads at different points along the cd. The laser is 24 mm from the center. What should the angular speed be in rev/sec for the cd?

Answer 1

The angular speed of the CD should be approximately 54.17 rev/sec.

Step-by-step explanation:

The angular speed of the CD can be calculated using the formula:

angular speed = linear speed / radius

Given that the linear speed is constant at 1.30 m/s, and the laser is 24 mm (or 0.024 m) from the center, we can substitute these values into the formula:

angular speed = 1.30 m/s / 0.024 m = 54.17 rev/sec

So, the angular speed of the CD should be approximately 54.17 rev/sec.