rotational kinematics



1)        A Frisbee thrown from rest achieves a rotational speed of 46.5 rad/s in 0.420 s. What is its angular acceleration?






2)        If a rotating disc has an acceleration of −0.85 rad/s2 and an initial velocity of 22 rad/s, how many radians will it spin before coming to a stop? How many rotations is that?






3)        Another one of those spinning things has a speed of 35 rad/s. To make it stop in 5.4 s over 3.0 rotations, what acceleration will it experience?