Hey, can any of you clarify a few things for me? I'd greatly appreciate it, thanks! If the work done on an object is by conservative forces, does that mean the momentum is conserved? I know if there aren't any external forces, then momentum is conserved. Does conservative forces mean no external forces? Also, is the work-kinetic energy theorem still valid for nonconservative forces? Lastly, if there are no external forces in the x direction but there is in the y direction, then it's possible that the y component of the momentum is not constant right? Thanks!