Differential pulley the system becomes a simple "gun tackle" with a mechanical advantage of 2. The same principle is used in a differential windlass, where the connected pulleys are replaced by winches. In the above graphic, the four segments of the chain are labelled W, X, Y and Z. The magnitudes of their corresponding forces are "F", "F", "F" and "F", respectively. Assuming that the chain is massless, "F" = 0 because segment X is not supporting any weight. Taking the system at equilibrium, "F" and "F" are equal — if they were not, the lower pulley would freely turn until they
Rope-a-dope power of welterweight titlist Miguel Cotto in their November 2009 fight. Pacquiao followed the rope-a-dope with a knockdown. Nicolino Locche, Argentine boxer nicknamed "El Intocable" (The Untouchable), used this technique extensively throughout his career. He would get against the ropes and dodge nearly every single punch until his opponent would tire, then he would take him down with combinations. "Irish" Micky Ward utilized this strategy during many of the fights in the later part of his career. Ward would wait for his opponent to become fatigued and would hit with either a left hook to the body or any number