I have been using David Morin' drafts on waves along with French's wave book and Fox Smith's book for my undergrad wave course and one thing I don't understand is the physical intuition behind reflection from a free end. I understand the boundary conditions and the mathematics but a couple of things I can't understand how they physically actually happen:
In French's book he says that the incoming upward pulse causes the massless ring to apply an equal reaction force but in upward direction, but shouldn't it be downward?
If the boundary conditions require that the massless ring be always horizontal and hence apply no transverse force then how is it supposed to create a total upward reflected wave?
So can anyone explain me what is the physical intuition behind reflection from free end as in what actually physically happens and how the forces play out to create the upright reflection?
Note: please don't mark my question as duplicate because I have already searched the forum and none of the related questions have my answer and also there is a related question but no one has answered. So please consider my question.