1,质料均匀、粗细相同的光滑直棒长为L、重为G,一端与固定轴A相连,可绕轴无摩擦转动,棒搁在边长为a的立方体上(a< \x15L),立方体静止在水平地面上,则棒与立方体接触点P在棒 P 上距A的距离AP
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![1,质料均匀、粗细相同的光滑直棒长为L、重为G,一端与固定轴A相连,可绕轴无摩擦转动,棒搁在边长为a的立方体上(a< \x15L),立方体静止在水平地面上,则棒与立方体接触点P在棒 P 上距A的距离AP](/uploads/image/z/8194951-55-1.jpg?t=1%2C%E8%B4%A8%E6%96%99%E5%9D%87%E5%8C%80%E3%80%81%E7%B2%97%E7%BB%86%E7%9B%B8%E5%90%8C%E7%9A%84%E5%85%89%E6%BB%91%E7%9B%B4%E6%A3%92%E9%95%BF%E4%B8%BAL%E3%80%81%E9%87%8D%E4%B8%BAG%2C%E4%B8%80%E7%AB%AF%E4%B8%8E%E5%9B%BA%E5%AE%9A%E8%BD%B4A%E7%9B%B8%E8%BF%9E%2C%E5%8F%AF%E7%BB%95%E8%BD%B4%E6%97%A0%E6%91%A9%E6%93%A6%E8%BD%AC%E5%8A%A8%2C%E6%A3%92%E6%90%81%E5%9C%A8%E8%BE%B9%E9%95%BF%E4%B8%BAa%E7%9A%84%E7%AB%8B%E6%96%B9%E4%BD%93%E4%B8%8A%28a%EF%BC%9C+%5Cx15L%29%2C%E7%AB%8B%E6%96%B9%E4%BD%93%E9%9D%99%E6%AD%A2%E5%9C%A8%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E5%88%99%E6%A3%92%E4%B8%8E%E7%AB%8B%E6%96%B9%E4%BD%93%E6%8E%A5%E8%A7%A6%E7%82%B9P%E5%9C%A8%E6%A3%92+P+%E4%B8%8A%E8%B7%9DA%E7%9A%84%E8%B7%9D%E7%A6%BBAP)
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