i hve one conceptual doubt
case-1 we hve a rod in a horinzontal plane and a bullet comes and strike it as some point...in these cases we apply momentum conservation the linear one,about the point of collision
case2- we hve a rod which is not hinged and it is rotating with w about com and again one bullet strikes it at some point..Now here when we conserve linear momentum we conserve it about the com unlike in fixed axis rotation..why is this so?...