Hello everyone, Two blocks M and m (M is more massive) are sliding freely with the same initial speed across a floor with friction coefficient μk > 0, and they come to a stop. Initially there is a distance x between them. While they are sliding to a stop, A) The distance between them becomes smaller B) The distance between them becomes greater C) The distance between them stays the same So the equation that I tried with is (Coefficient of Friction) ( Normal Force ) = Friction. According to this equation, M should have a larger normal force, therefore, a bigger frictional force. But the correct answer is C? Can someone explain this please?!?