Starting from rest, a disk rotates about its central axis with constant angular acceleration of 7 rad/s until it attains angular velocity of 150 rad/s. Through what angle in radians does the disk rotate ? Here are the kinematic equations for constant angular acceleration: w = wo + at. 8 - 80 = wot + fat? w2 = wa + 20 (0 - 80), 8 - 80 = + ( wo + w) t , 8 - 80 = wt - tat