Rotational Motion

A small mass m is attached to a massless string whose other end is fixed at P as shown in the figure. The mass is undergoing circular motion in the xy-plane with centre at O and constant angular speed \(\omega\). If the angular momentum of the system, calculated about O and P are denoted by \({\overrightarrow L _O}\) and \({\overrightarrow L _P}\), respectively, then