## Essential University Physics: Volume 1 (3rd Edition)

We know that moment of inertia is given as $I=mr^2$ We plug in the known values to obtain: $I=(0.640)(\frac{0.90}{2})^2=0.1296Kgm^2$ Then angular speed is given as $\omega=2\pi(\frac{170}{60})=17.80\frac{rad}{s}$ Thus, the angular momentum is given as $L=I\omega$ We plug in the known values to obtain: $L=(0.1296)(17.80)=2.3kg\frac{m^2}{s}$