在光滑水平地面上放置一个立方体木箱,木箱的质量M=2kg、边长L=20cm.一长L=1 m的轻质光滑细杆,一端固定一质量m=(2倍根号3kg)的匀质小球,另一端通过光滑铰链与水平面相连,如图所示.木箱在杆
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![在光滑水平地面上放置一个立方体木箱,木箱的质量M=2kg、边长L=20cm.一长L=1 m的轻质光滑细杆,一端固定一质量m=(2倍根号3kg)的匀质小球,另一端通过光滑铰链与水平面相连,如图所示.木箱在杆](/uploads/image/z/2077550-62-0.jpg?t=%E5%9C%A8%E5%85%89%E6%BB%91%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%E6%94%BE%E7%BD%AE%E4%B8%80%E4%B8%AA%E7%AB%8B%E6%96%B9%E4%BD%93%E6%9C%A8%E7%AE%B1%2C%E6%9C%A8%E7%AE%B1%E7%9A%84%E8%B4%A8%E9%87%8FM%3D2kg%E3%80%81%E8%BE%B9%E9%95%BFL%3D20cm.%E4%B8%80%E9%95%BFL%3D1+m%E7%9A%84%E8%BD%BB%E8%B4%A8%E5%85%89%E6%BB%91%E7%BB%86%E6%9D%86%2C%E4%B8%80%E7%AB%AF%E5%9B%BA%E5%AE%9A%E4%B8%80%E8%B4%A8%E9%87%8Fm%3D%EF%BC%882%E5%80%8D%E6%A0%B9%E5%8F%B73kg%EF%BC%89%E7%9A%84%E5%8C%80%E8%B4%A8%E5%B0%8F%E7%90%83%2C%E5%8F%A6%E4%B8%80%E7%AB%AF%E9%80%9A%E8%BF%87%E5%85%89%E6%BB%91%E9%93%B0%E9%93%BE%E4%B8%8E%E6%B0%B4%E5%B9%B3%E9%9D%A2%E7%9B%B8%E8%BF%9E%2C%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA.%E6%9C%A8%E7%AE%B1%E5%9C%A8%E6%9D%86)
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