A uniform solid sphere of mass \(M\) and radius \(R\) rolls without slipping along a horizontal surface with a constant center-of-mass speed \(v\). The rotational inertia of a solid sphere about its center of mass is \(I = \dfrac{2}{5}MR^2\). Which of the following correctly describes the relationship between the sphere's rotational kinetic energy \(K_{rot}\) and its total kinetic energy \(K_{total}\)?