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A 7.71 kg board is placed on two poles. One end of the board lies on on the leftmost pole. The board is 5.00 meters

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A 7.71 kg board is placed on two poles. One end of the board lies on on the leftmost pole. The board is 5.00 meters long, and the center of gravity for the board is in the middle of the board. If the other pole is placed 2.77 meters from the left end, what is the upward force (in N) the that pole exerts on the board

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