1. The problem statement, all variables and given/known data I'm trying to recall this problem my ap physics teacher told us about a while ago in order to tell a friend, but I can't really remember the details. The basic idea is that you attach a rope to a fixed point (say, on a ceiling). The rope has a certain maximum tension past which it will break at some point. I think what we did is we simplified the system; we said that the rope has some mass that we can pretend is concentrated at one point. As it turns out, even if you applied the exact same force, if you pulled really hard on the rope, it would break on one side of that point; if you pulled slowly, it would break on the other side. (Actually, it may have been vice versa, I can't remember) The question then basically asked, why is this? 2. Relevant equations F=ma 3. The attempt at a solution I'm just trying to recall the details of the problem; under which circumstances does it break on the upper side of the rope or the lower? Perhaps somebody familiar with the problem could restate it more articulately. If you recall the reason why it breaks at different points, I'd appreciate that too; I think it had something to do with the fact that our basic model of forces made an untrue assumption as it applied to this problem. Thanks.