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A 24.0 kg backpack is suspended midway between two trees by a light cord as in the figure (Figure 1) . A bear grabs the backpack and pulls vertically downward with a constant force, so that each section of cord makes an angle of 27 degrees below the horizontal. Initially, without the bear pulling, the angle was 17 degrees ; the tension in the cord with the bear pulling is double what it was when he was not

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