如图所示,物体从高AE=h1=2m,倾角a为37°的顶坡由静止开始下滑,到坡底后又经过BC=20m一段水平距离,再沿另一倾角β=30°的斜坡向上滑动到D处静止DF=h2=1.75m,设物体与各段表面的动摩擦因数都相等,
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![如图所示,物体从高AE=h1=2m,倾角a为37°的顶坡由静止开始下滑,到坡底后又经过BC=20m一段水平距离,再沿另一倾角β=30°的斜坡向上滑动到D处静止DF=h2=1.75m,设物体与各段表面的动摩擦因数都相等,](/uploads/image/z/5421706-34-6.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E7%89%A9%E4%BD%93%E4%BB%8E%E9%AB%98AE%3Dh1%3D2m%2C%E5%80%BE%E8%A7%92a%E4%B8%BA37%C2%B0%E7%9A%84%E9%A1%B6%E5%9D%A1%E7%94%B1%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E4%B8%8B%E6%BB%91%2C%E5%88%B0%E5%9D%A1%E5%BA%95%E5%90%8E%E5%8F%88%E7%BB%8F%E8%BF%87BC%3D20m%E4%B8%80%E6%AE%B5%E6%B0%B4%E5%B9%B3%E8%B7%9D%E7%A6%BB%2C%E5%86%8D%E6%B2%BF%E5%8F%A6%E4%B8%80%E5%80%BE%E8%A7%92%CE%B2%3D30%C2%B0%E7%9A%84%E6%96%9C%E5%9D%A1%E5%90%91%E4%B8%8A%E6%BB%91%E5%8A%A8%E5%88%B0D%E5%A4%84%E9%9D%99%E6%AD%A2DF%3Dh2%3D1.75m%2C%E8%AE%BE%E7%89%A9%E4%BD%93%E4%B8%8E%E5%90%84%E6%AE%B5%E8%A1%A8%E9%9D%A2%E7%9A%84%E5%8A%A8%E6%91%A9%E6%93%A6%E5%9B%A0%E6%95%B0%E9%83%BD%E7%9B%B8%E7%AD%89%2C)
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