A solid sphere of mass \(M\) and radius \(R\) is placed at rest at a vertical height \(H\) on an incline that makes an angle \(\theta\) with the horizontal. The surface of the incline has non-negligible friction, and the sphere rolls without slipping down the incline. The rotational inertia of a solid sphere about its center of mass is \(I = \dfrac{2}{5}MR^2\).