An audio compact disk (CD) has a playing time of 55 minutes. When the music starts, the CD is

rotating at an angular speed of 480 revolutions per minute (rpm) and during the playback the

rotation slows down. The average angular acceleration of the CD is a = -4.0 rev/min . Find the

angular speed at which the CD is rotating at the end of the music. Express your answer both in

rev/min and also in rad/s.

Select one:

27.2 rad/s

220 rad/s

120 rad/s

260 rad/s

22 rad/s

rotating at an angular speed of 480 revolutions per minute (rpm) and during the playback the

rotation slows down. The average angular acceleration of the CD is a = -4.0 rev/min . Find the

angular speed at which the CD is rotating at the end of the music. Express your answer both in

rev/min and also in rad/s.

Select one:

27.2 rad/s

220 rad/s

120 rad/s

260 rad/s

22 rad/s

Answer

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Answer:See below

Explanation:-4 rev / min^2 * 55 min = - 220 rev/ min

480 - 220 = 260 rev/min at end

2pi radians /rev * 260 rev/min = 1633.6 Radians/min