如图所示,三块板重均为100N,相互间的滑动摩擦系数均为0.2,现将它们叠放在水平地面上,最上面一块和最下面一块均用水平绳子系在左边墙上,若要将中间一块板从上、下两块板之间抽出,至少需
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![如图所示,三块板重均为100N,相互间的滑动摩擦系数均为0.2,现将它们叠放在水平地面上,最上面一块和最下面一块均用水平绳子系在左边墙上,若要将中间一块板从上、下两块板之间抽出,至少需](/uploads/image/z/6974765-53-5.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E4%B8%89%E5%9D%97%E6%9D%BF%E9%87%8D%E5%9D%87%E4%B8%BA100N%2C%E7%9B%B8%E4%BA%92%E9%97%B4%E7%9A%84%E6%BB%91%E5%8A%A8%E6%91%A9%E6%93%A6%E7%B3%BB%E6%95%B0%E5%9D%87%E4%B8%BA0.2%2C%E7%8E%B0%E5%B0%86%E5%AE%83%E4%BB%AC%E5%8F%A0%E6%94%BE%E5%9C%A8%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E6%9C%80%E4%B8%8A%E9%9D%A2%E4%B8%80%E5%9D%97%E5%92%8C%E6%9C%80%E4%B8%8B%E9%9D%A2%E4%B8%80%E5%9D%97%E5%9D%87%E7%94%A8%E6%B0%B4%E5%B9%B3%E7%BB%B3%E5%AD%90%E7%B3%BB%E5%9C%A8%E5%B7%A6%E8%BE%B9%E5%A2%99%E4%B8%8A%2C%E8%8B%A5%E8%A6%81%E5%B0%86%E4%B8%AD%E9%97%B4%E4%B8%80%E5%9D%97%E6%9D%BF%E4%BB%8E%E4%B8%8A%E3%80%81%E4%B8%8B%E4%B8%A4%E5%9D%97%E6%9D%BF%E4%B9%8B%E9%97%B4%E6%8A%BD%E5%87%BA%2C%E8%87%B3%E5%B0%91%E9%9C%80)
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