A disk 15 cm in diameter rotates counterclockwise in a horizontal plane, accelerating uniformaly from 33 rpm to 45 rpm in 1 min.
A) What is the angular acceleration of the disk?
B) What is the angular speed of the disk 30 sec after it starts to accelerate?
C) What is the tangential speed of a point on the edge of the disk 30 sec after it starts to accelerate?
D) Through how many rotations does the disk turn while accelerating from 33 rpm to 45 rpm?