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OpenStudy (anonymous):
A uniform, aluminum beam 9.00m long, weighting 300N , rests symmetrically on two supports 5.00m apart. A boy weighing 600N starts at point A and walks toward the right. How far beyond point B can the boy walk before the beam tips? How far from the right end of the beam should support B be placed so that the boy can walk just to the end of the beam without causing it to tip?
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