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Created page with 'A '''Block and tackle''' is a system of two pulleys and one rope. One of the pulleys, the fixed pulley, is attached to a point overhead. The other, the movable pulley, is a...'
A '''Block and tackle''' is a system of two [[pulley]]s and one rope. One of the pulleys, the fixed pulley, is attached to a point overhead. The other, the movable pulley, is attached to a load. By pulling the rope through both pulleys, we gain a [[mechanical advantage]], so that, for instance, a 100-pound load can be raised with a 50-pound force.