Force x force arm = weight x weight arm.
A force of 1 pound at a distance of 6, or with a force arm 6, will
balance a weight of 2 pounds with a weight arm 3; that is,
1 x 6 = 2 x 3.
Similarly a force of 10 pounds may be made to sustain a weight of 100
pounds, providing the force arm is 10 times longer than the weight
arm; and a force arm of 800 pounds, at a distance of 10 feet from the
fulcrum, may be made to sustain a weight of 8000 pounds, providing the
weight is 1 foot from the fulcrum.
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