The $100-kg$ pendulum has a center of mass at $G$ and a radius of gyration about $G$ of $k_G=250mm.$ At the instant shown, $=60$ and the pendulum is rotating at $=6ra\frac{d}{s}(CW).$ Find:

a$.$ The angular acceleration of the pendulum at this instant.

b$.$ The magnitude of the reaction force at pin $C$ at this instant. ANSWER: PART a is close to $6,$ Part b is close to $3\mathrm{.}5$ kN$.$ Draw FBD and IRD