1. The problem statement, all variables and given/known data Consider a circular wheel with a mass m, and a radius R. The moment of inertia about the center of the wheel is I = kmR^2, where k is a constant in the range between 0.5<k<1.0. A rope wraps around the wheel. A weight of mass 2m is attached to the end of this rope. At some moment, the weight is falling with a speed v. The total kinetic energy K of the system at this moment is given by what mathematical equation? 2. Relevant equations K = 1/2 mv^2 3. The attempt at a solution I know that the mass of the wheel will have to be considered to find the final kinetic energy...can someone please give me a hint what to do next?