Hello. Let's assume I have a thin metal stick (or other material) anchored to a wall at one extremity (A), and free to move on the other extremity (B). If I push down the extremity B and then release it, the stick starts to vibrate for some time (especially in the points closer to B). If I push it too much it may even break. What are the quantities that I should consider in order to model fairly accurately the behavior of such a system?