Two balls of negligible radius are connected by a rod with a length of 2.40 m. The rod has a negligible mass. One ball has a mass M, while the other has a mass of 2M
(a) If you spin this system about an axis that is perpendicular to the rod, how far from the ball of mass M should you place the axis to minimize the system's rotational inertia?_____m.
(b) If M1.70 kg, what is this minimum rotational inertia?_______ kg m2.