You have made a physical pendulum by swinging a rod of mass $M=1\mathrm{.}51kg$ and length $L=0\mathrm{.}99$ meters around its end. The mass of the rod is distributed uniformly along its length. We will assume that the amplitude of the swing is ${}_{\text{m}\text{a}\text{x}}=8\mathrm{.}16$ degrees.

Solid Rod Swings in Simple Harmonic Motion