If the disk is subjected to a couple moment M, determine the disks rotation required for equilibrium. The end of the spring wraps around

If the disk is subjected to a couple moment M, determine the disk’s rotation θ required for equilibrium. The end of the spring wraps around the periphery of the disk as the disk turns. The spring is originally unstretched.

k = 4 kN/m 0.5 m M = 300 Nm