如图所示,两个完全相同的球,重力大小均为G,两球与水平地面间的动摩擦因数都为μ,且假设最大静摩擦力等于滑动摩擦力,一根轻绳两端固结在两个球上,在绳的中点施加一个竖直向上的拉力,
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![如图所示,两个完全相同的球,重力大小均为G,两球与水平地面间的动摩擦因数都为μ,且假设最大静摩擦力等于滑动摩擦力,一根轻绳两端固结在两个球上,在绳的中点施加一个竖直向上的拉力,](/uploads/image/z/2017535-23-5.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E4%B8%A4%E4%B8%AA%E5%AE%8C%E5%85%A8%E7%9B%B8%E5%90%8C%E7%9A%84%E7%90%83%2C%E9%87%8D%E5%8A%9B%E5%A4%A7%E5%B0%8F%E5%9D%87%E4%B8%BAG%2C%E4%B8%A4%E7%90%83%E4%B8%8E%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E9%97%B4%E7%9A%84%E5%8A%A8%E6%91%A9%E6%93%A6%E5%9B%A0%E6%95%B0%E9%83%BD%E4%B8%BA%CE%BC%2C%E4%B8%94%E5%81%87%E8%AE%BE%E6%9C%80%E5%A4%A7%E9%9D%99%E6%91%A9%E6%93%A6%E5%8A%9B%E7%AD%89%E4%BA%8E%E6%BB%91%E5%8A%A8%E6%91%A9%E6%93%A6%E5%8A%9B%2C%E4%B8%80%E6%A0%B9%E8%BD%BB%E7%BB%B3%E4%B8%A4%E7%AB%AF%E5%9B%BA%E7%BB%93%E5%9C%A8%E4%B8%A4%E4%B8%AA%E7%90%83%E4%B8%8A%2C%E5%9C%A8%E7%BB%B3%E7%9A%84%E4%B8%AD%E7%82%B9%E6%96%BD%E5%8A%A0%E4%B8%80%E4%B8%AA%E7%AB%96%E7%9B%B4%E5%90%91%E4%B8%8A%E7%9A%84%E6%8B%89%E5%8A%9B%2C)
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