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If he sits up and raises his feet just as he crosses the

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A boy with a weight of 150 lbs is at rest when the swing makes an angle of 30o with the vertical. His center of gravity is 10 feet from point A. If he sits up and raises his feet just as he crosses the vertical line, so that his center of gravity is 9 feet from point A, what angle with the vertical will the swing make when the swing reaches its maximum height?

Reference no: EM13642912

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