A magnetic computer disk 7.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates at 590 rad/s2 for 1/2 s, then coasts at a steady angular velocity for another 1/4 s.
What is the speed of the dot at t = 0.75 s?
m/s
Through how many revolutions has the disk turned?
rev