Can a small force ever exert a greater torque than a larger force? Explain If the net force on a system is zero, is the net torque also zero? If the net torque on a system is zero, is the net force zero? Explain and give examples. A book has three symmetry axes through its center, all mutually perpendicular. The book's moment of inertia would be smallest about which of the three? Explain. We claim that momentum and angular momentum are conserved. Yet most moving or rotating objects eventually slow down and stop. Explain. Can the mass of a rigid object be considered concentrated at its CM for rotational motion? Explain