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?

Question

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?

anonymous · Answer

avg ang acc = (change in rotation rate)/(time to stop) = a

@ = (1/2) a t^2

anonymous · Answer

Thank you