Simple lever system

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“Suppose that A is the lever, B the fulcrum, D the weight to be raised, and C the power. Let D by considered three times as heavy as C, and the fulcrum three times as far from C as it is from D; then the weight and power will exactly balance each other out.” -Comstock 1850




J. L. Comstock A System of Natural Philosophy: Principles of Mechanics (: Pratt, Woodford, and Company, 1850) 70


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