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Brown - figure 022 |
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Description
Are different arrangements of pulley*: The following rule applies to these pulleys : — In a system of pulleys where each pulley is embraced by a cord attached at one end to a fixed point and at the other to the center of the movable pulley, the effect of the whole will be = the number 2,multiplied by itself as many times as there are movable pulleys in the system. |
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