The rotational kinetic energy for a body that is rolling is is boldsymbol frac12IΩ² (where I is moment of inertia about its centre of mass) and the translational kinetic energy is boldsymbol frac12mv² for a rolling v is speed of its centre of mass for an inertial observer. If we add both of these for the body shown in the figure then we should get its total kinetic energy at a particular instant. What could be the reason for the formula yielding the wrong answer in this case?