A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is r
otating at 11.0 rev/s; 30.0 revolutions later, its angular speed is 18.0 rev/s. Calculate (a) the angular acceleration (rev/s2), (b) the time required to complete the 30.0 revolutions, (c) the time required to reach the 11.0 rev/s angular speed, and (d) the number of revolutions from rest until the time the disk reaches the 11.0 rev/s angular speed.
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