If take 2 rolling bodies on surface and spring between them.
http://knol.google.com/k/paradox-of-classical-mechanics-2#
These objects with same mass and radius and different moment of inertia through the spring are repulsing on surface. Base on kinematics equations, these objects will take a different translational velocities relatively to repulsing point. However surface wont take any movements during repulsing action, because these rolling bodies share same spring. What is wrong? The law of momentum conservation wasn't discovered for rotational and translational motion of physics kinematic calculation should get correction?