As you finish listening to your favorite compact disc (CD), the CD in the player slows down to a stop. Assume that the CD spins down with a constant angular acceleration. If the CD rotates clockwise at 500 rpm (revolutions per minute) while the last song is playing, and then spins down to zero angular speed in 2.60 s with constant angular acceleration, what is ααalpha, the magnitude of the angular acceleration of the CD, as it spins to a stop? How many revolutions does the CD make as it spins to a stop?

The answer is :

20.1 rad/s^2

10.8 revolutions

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