Homework Help: Physics

Posted by alexs on Monday, December 21, 2009 at 6:51pm.

) Joe has a playing time of 74 minutes. When the music starts, the CD rotating at an angular speed of 480 revolutions per minute (rpm). At the end of the music, the CD is rotating at 210 rpm. Find the magnitude of the average angular acceleration of the CD (in rad/s^2)

Physics - bobpursley, Monday, December 21, 2009 at 7:05pm
ang acceleration= (wf-wi)/time

change 74 min to seconds
change rpm to rad/sec (multiply by 2PI/60)
Physics - alexs, Monday, December 21, 2009 at 7:10pm
thanks a lot

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