pendulum of a grandfather clock, which can be modelled as a light rod of length, l$,$ bonded to a disk which has mass m and centroidal radius of gyration k $($where l is measured from O to the disk centre$).$ The pendulum is released from rest at an angle $\backslash$theta to the vertical. Assume the pivot at O is frictionless and express

your answers in terms of $\backslash$theta and the parameters. $($It is not necessary to reduce these to

the simplest mathematical form.$)$ Derive an expression for the angular acceleration