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Unformatted text preview: physically tenable. When analyzing a rope and pulley situation it is useful to define a direction not in terms of up or down, but in terms of the shape of the rope. In the situation above, we can define the positive direction on the rope as pointing upward on the left side of the pulley, and pointing downward on the right side. When we define direction in this way the rope does actually experience two equal and opposite forces....
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- Fall '09