You could also use the cosine of the angle to determine the speed at which the arrow moves, and just control the angle of the arrow.
> To imitate that motion, I would find the angle of the arrow, and have the following pieces attempt to align with a position that extends backwards from the current angle.
i dont understand at all what you say !!!
that make me confused that simple mouvement like that ... and i dont find it
What part don't you understand?