Dynamics Problem: Incline Block and Moment of Interia

[JcAcefighter]

Homework Statement

Homework Equations

∑F=ma
∑M=Iα

3. The Attempt at a Solution
I used the dynamic equilibrium formulas to find the tension. The tension helps me to find the acceleration of the block. Then, I used kinematics to find the velocity. But, I'm not getting the right answer.correct answer: Vb= 0.5214 m/s 325°

 

[ehild]

I do not see that you used the given moment of 0.3 Nm.