如图所示,小球A系在细线的一端,线的另一端固定在O点,O点到水平面的距离为L.物块b的质量是小球的3倍,置于粗糙的水平面上且位于O点正下方,物块与水平面间的动摩擦因数为u.现拉动小球使线
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![如图所示,小球A系在细线的一端,线的另一端固定在O点,O点到水平面的距离为L.物块b的质量是小球的3倍,置于粗糙的水平面上且位于O点正下方,物块与水平面间的动摩擦因数为u.现拉动小球使线](/uploads/image/z/14215874-50-4.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%B0%8F%E7%90%83A%E7%B3%BB%E5%9C%A8%E7%BB%86%E7%BA%BF%E7%9A%84%E4%B8%80%E7%AB%AF%2C%E7%BA%BF%E7%9A%84%E5%8F%A6%E4%B8%80%E7%AB%AF%E5%9B%BA%E5%AE%9A%E5%9C%A8O%E7%82%B9%2CO%E7%82%B9%E5%88%B0%E6%B0%B4%E5%B9%B3%E9%9D%A2%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B8%BAL.%E7%89%A9%E5%9D%97b%E7%9A%84%E8%B4%A8%E9%87%8F%E6%98%AF%E5%B0%8F%E7%90%83%E7%9A%843%E5%80%8D%2C%E7%BD%AE%E4%BA%8E%E7%B2%97%E7%B3%99%E7%9A%84%E6%B0%B4%E5%B9%B3%E9%9D%A2%E4%B8%8A%E4%B8%94%E4%BD%8D%E4%BA%8EO%E7%82%B9%E6%AD%A3%E4%B8%8B%E6%96%B9%2C%E7%89%A9%E5%9D%97%E4%B8%8E%E6%B0%B4%E5%B9%B3%E9%9D%A2%E9%97%B4%E7%9A%84%E5%8A%A8%E6%91%A9%E6%93%A6%E5%9B%A0%E6%95%B0%E4%B8%BAu.%E7%8E%B0%E6%8B%89%E5%8A%A8%E5%B0%8F%E7%90%83%E4%BD%BF%E7%BA%BF)
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