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If the rotational speed of a CD changes from 550 rpm to 200 rpm as it plays 30 minutes of music, what is the CD's average rotat...Asked by Beth
If the rotational speed of a CD changes from 650 rpm to 250 rpm as it plays 30 minutes of music, what is the CD's average rotational acceleration?
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Answered by
bobpursley
changespeed = 2PI(350-650)/60 rad/sec
change in time= 30*60 sec
acceleration= changespeed/time= 2PI(350-650)/(30*60*60)
change in time= 30*60 sec
acceleration= changespeed/time= 2PI(350-650)/(30*60*60)