Starting from rest, a wheel has constant a = 3.0 rad/s2. During a certain 4.0 s interval, it turns through 120 rad. How much time did it take to reach that 4.0 s interval?

A 40.0-cm diameter disk rotates with a constant angular acceleration of 2.90 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (a) At t = 2.50 s, find the angular speed of the wheel. rad/s(b) At t = 2.50 s, find the magnitude of the linear velocity and tangential acceleration of P. linear velocity      m/s tangential acceleration      m/s2 (c) At t = 2.50 s, find the position of P (in degrees, with respect to the positive x-axis). ° counterclockwise from the +x-axis

A wheel has a constant angular acceleration of 1.4 rad/s2. During a certain 7.0 s interval, it turns through an angle of 76 rad. Assuming that the wheel started from rest, how long had it been in motion before the start of the 7.0 s interval?

A wheel has a constant angular acceleration of 2.7 rad/s2. During a certain 2.0 s interval, it turns through an angle of 21 rad. Assuming that the wheel started from rest, how long had it been in motion before the start of the 2.0 s interval?