Rotational Kinematics of a disk

[Batman4t]

Homework Statement

A disk with a radial line painted on it is mounted on an axle perpendicular to it and running through its center. It is initially at rest, with the line at q0 = -90.0°. The disk then undergoes constant angular acceleration. After accelerating for 3.15 s, the reference line has been moved part way around the circle (in a counterclockwise direction) to qf = 130°.

Given this information, what is the angular speed of the disk after it has traveled one complete revolution (when it returns to its original position at -90.0°)?

Homework Equations

http://www.ajdesigner.com/phpcircularmotion/centripetal_acceleration_equation.php

The Attempt at a Solution

Not sure I know have to use Rotational Kinematics to find the angular velocity first.

 

[Shooting Star]

You have to use only the eqns of Rotational Kinematics, not dynamics.