Hi WalterWhat is the mechanism for making all of the parts of the fly leg decelerate at the same time?
Keeping in mind the assumptions: straight horizontal fly leg, flexible but not stretchable line.
The mechanism lies in the fact that tension varies at the same time all over the fly leg. Can you imagine a mechanism by which all parts of the fly leg would have a different flying speed under the simplified assumptions? It is the same medium for all “particles”.
I dislike the subtleties of “collisions” viewed in physics by opposition to common sense perception. For laymen a collision means that there is an antagonism somewhere. Here we do not have a locomotive pulling on coaches. As the locomotive slows down, one could imagine that coaches would collide with the locomotive, pushing it forwards. But here our coaches have brakes/engines (tension) which follows the action of the locomotive. I then hardly imagine an actual “collision” within the line, or we are on semantic grounds for specialists.
Merlin