Exam 3 Review:  Chapter 10:  Muscles as Levers

leverage - The action of a lever in moving a load against a fulcrum; the mechanical advantage gained by the lever.

effort - The mechanical force applied to a lever in order to move a load against a fulcrum.

resistance = load - The weight or mass of an object which can be moved by a lever if sufficient effort (force) is applied to the lever.

fulcrum - The fixed point in a lever system which supports the rod (the lever) which can move the load when a force is applied to the lever.

mechanical advantage - The ratio of the force exerted by a machine to the force applied to it; when a machine such as a lever takes a small input force and increases the magnitude of the output force; e.g., the mechanical advantage of a lever is increased by increasing the distance between the effort application point and the fulcrum or decreasing the distance between the load application point and the fulcrum.

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