如图所示,均匀木棒AB长为1m,水平放置在O、O’两个支点上.已知AO、O’B长度均为 0.25m如图所示,均匀木棒AB长为1m,水平放置在O、O’两个支点上.已知AO、O’B长度均为 0.25m.若把B端竖直向上稍微抬
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![如图所示,均匀木棒AB长为1m,水平放置在O、O’两个支点上.已知AO、O’B长度均为 0.25m如图所示,均匀木棒AB长为1m,水平放置在O、O’两个支点上.已知AO、O’B长度均为 0.25m.若把B端竖直向上稍微抬](/uploads/image/z/2385489-57-9.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%9D%87%E5%8C%80%E6%9C%A8%E6%A3%92AB%E9%95%BF%E4%B8%BA1m%2C%E6%B0%B4%E5%B9%B3%E6%94%BE%E7%BD%AE%E5%9C%A8O%E3%80%81O%E2%80%99%E4%B8%A4%E4%B8%AA%E6%94%AF%E7%82%B9%E4%B8%8A.%E5%B7%B2%E7%9F%A5AO%E3%80%81O%E2%80%99B%E9%95%BF%E5%BA%A6%E5%9D%87%E4%B8%BA+0.25m%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%9D%87%E5%8C%80%E6%9C%A8%E6%A3%92AB%E9%95%BF%E4%B8%BA1m%2C%E6%B0%B4%E5%B9%B3%E6%94%BE%E7%BD%AE%E5%9C%A8O%E3%80%81O%E2%80%99%E4%B8%A4%E4%B8%AA%E6%94%AF%E7%82%B9%E4%B8%8A.%E5%B7%B2%E7%9F%A5AO%E3%80%81O%E2%80%99B%E9%95%BF%E5%BA%A6%E5%9D%87%E4%B8%BA+0.25m.%E8%8B%A5%E6%8A%8AB%E7%AB%AF%E7%AB%96%E7%9B%B4%E5%90%91%E4%B8%8A%E7%A8%8D%E5%BE%AE%E6%8A%AC)
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