A simple pendulum has a bob with a mass of $0.50$ kg. The cord has a length of $1.5$ m, and the bob is displaced $20^\circ$.
I am trying to use this expression to find the maximum velocity of the bob.
$$\omega^2_f = 2 \alpha\Delta\theta$$
I get the following expression:
$$\frac{v^2}{L^2} = 2L\frac{mg\sin\theta}{I}\Delta\theta$$
Is this expression correct to solve the question?