物理力矩平衡问题某古建筑物上有一装饰构件,构件由四条长度相同、重力均为G的匀质直杆组成.它们均由灵活的铰链衔接,组成一个菱形ABCD(示意图如图所示).BD间用一条链条相连(链条重
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![物理力矩平衡问题某古建筑物上有一装饰构件,构件由四条长度相同、重力均为G的匀质直杆组成.它们均由灵活的铰链衔接,组成一个菱形ABCD(示意图如图所示).BD间用一条链条相连(链条重](/uploads/image/z/6645088-64-8.jpg?t=%E7%89%A9%E7%90%86%E5%8A%9B%E7%9F%A9%E5%B9%B3%E8%A1%A1%E9%97%AE%E9%A2%98%E6%9F%90%E5%8F%A4%E5%BB%BA%E7%AD%91%E7%89%A9%E4%B8%8A%E6%9C%89%E4%B8%80%E8%A3%85%E9%A5%B0%E6%9E%84%E4%BB%B6%2C%E6%9E%84%E4%BB%B6%E7%94%B1%E5%9B%9B%E6%9D%A1%E9%95%BF%E5%BA%A6%E7%9B%B8%E5%90%8C%E3%80%81%E9%87%8D%E5%8A%9B%E5%9D%87%E4%B8%BAG%E7%9A%84%E5%8C%80%E8%B4%A8%E7%9B%B4%E6%9D%86%E7%BB%84%E6%88%90.%E5%AE%83%E4%BB%AC%E5%9D%87%E7%94%B1%E7%81%B5%E6%B4%BB%E7%9A%84%E9%93%B0%E9%93%BE%E8%A1%94%E6%8E%A5%2C%E7%BB%84%E6%88%90%E4%B8%80%E4%B8%AA%E8%8F%B1%E5%BD%A2ABCD%EF%BC%88%E7%A4%BA%E6%84%8F%E5%9B%BE%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%EF%BC%89.BD%E9%97%B4%E7%94%A8%E4%B8%80%E6%9D%A1%E9%93%BE%E6%9D%A1%E7%9B%B8%E8%BF%9E%EF%BC%88%E9%93%BE%E6%9D%A1%E9%87%8D)
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