Explain why the rim brakes on a bicycle wheel are located at the outer edge of the wheel...

Explain why the rim brakes on a bicycle wheel are located at the outer edge of the wheel instead of near the hub. Hint: Consider the work–energy theorem (Eq. 9.9) and how the magnitude of the torque produced by a given force varies when the force is applied at different distances from the axis of rotation.

(reference equation 9.9)