(Solved): A momentum wheel for dynamics-class demonstrations is shown. It is basically a bicycle wheel modifi ...

A momentum wheel for dynamics-class demonstrations is shown. It is basically a bicycle wheel modified with rim band-weighting, handles, and a pulley for cord startup. The heavy rim band causes the radius of gyration of the 4.0-kg wheel to be $270\mathrm{mm}$. If a steady 35-N pull $F$ is applied to the cord, determine the angular acceleration $a$ of the wheel. Neglect bearing friction.