## College Physics (4th Edition)

The frequency of oscillation is $0.63~Hz$
We can find the period of a physical pendulum: $T = 2\pi~\sqrt{\frac{I_{support}}{mgL_{cm}}}$ $T = 2\pi~\sqrt{\frac{0.25~m^2}{(9.80~m/s^2)(0.40~m)}}$ $T = 1.587~s$ We can find the frequency: $f = \frac{1}{T}$ $f = \frac{1}{1.587~s}$ $f = 0.63~Hz$ The frequency of oscillation is $0.63~Hz$.