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Machines - how they work
Date Submitted: 10/04/2003 10:37:50
Category: / Science & Technology
Length: 6 pages (1520 words)
Views: 85601
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…exert five pounds of force to lift a one-pound can, but if the can is lifted one foot, the muscle only needs to contract one-fifth of a foot, a little over two inches. If the body were designed with a mechanical advantage of five, then the muscle would only have to pull with one-fifth of a pound of force, but it would have to contract five feet, and our elbows would drag across the ground.
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