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

We call the center of wheel the axis of rotation. Thus, we find: $mgcos\theta=(M+m)gsin\theta$ $mcos\theta-msin\theta=Msin\theta$ $m=\frac{Msin\theta}{cos\theta-sin\theta}$ $m>\frac{Msin\theta}{1-sin\theta}$