Calculate the angular velocity and angular acceleration (pendulum)

[Alexanddros81]

Homework Statement

13.53 The tension in the sting of the simple pendulum is 7.5N when θ=30deg.
Calculate the angular velocity and angular acceleration of the string at this instant.

Homework Equations

The Attempt at a Solution

Is this correct?

 

[Orodruin]

Looks reasonable overall. Did not check the explicit numbers.