decision tree (visualization of a complex decision-making situation in which the possible decisions and their likely outcomes are organized in the form of a graph that resembles a tree)
load amplied on a slide joint, parallel to the sliding axis but with a lever arm, so that the resulting torque blocks the system and prevents the sliding. This phenomenon is due to friction, and can be used by purpose, e.g. for an F-clamp or a roller freewheel. Over-centering, over-center locking, more than acceptable edge loading