A small disk $($mass$5$ kgkg $,$ radius$30$ cmcm $,$ and thickness$3$ mmmm $)$ is attached to a stand and is free to rotate about an axle as shown in$($Figure $1).$ The disk is held in the position shown and released, allowing it to swing downward $($toward the vertial part of the support$).$

Figure

$1$ of $1$

Part A

What is the angular acceleration of the disk the moment it is released?

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$65\mathrm{.}33$

rad$/$s$2$rad$/$s$2$