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OpenStudy (anonymous):
A disk is initially rotating 45 revolutions per minute. After placing a finger on the disk, it is observed that the disk stops in a time of 1.50s a) What is the average angular acceleration? b) What is the angle that the disk turns through during this time?
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OpenStudy (anonymous):
avg ang acc = (change in rotation rate)/(time to stop) = a @ = (1/2) a t^2
OpenStudy (anonymous):
Thank you
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