水平桌面上一重为200N的物体,与桌面的动摩擦因数为0.2,当依次用18N,38N,58N和78N的水平推力推此物体时,物体所受到的摩擦力依次为多大?
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![水平桌面上一重为200N的物体,与桌面的动摩擦因数为0.2,当依次用18N,38N,58N和78N的水平推力推此物体时,物体所受到的摩擦力依次为多大?](/uploads/image/z/1519393-49-3.jpg?t=%E6%B0%B4%E5%B9%B3%E6%A1%8C%E9%9D%A2%E4%B8%8A%E4%B8%80%E9%87%8D%E4%B8%BA200N%E7%9A%84%E7%89%A9%E4%BD%93%2C%E4%B8%8E%E6%A1%8C%E9%9D%A2%E7%9A%84%E5%8A%A8%E6%91%A9%E6%93%A6%E5%9B%A0%E6%95%B0%E4%B8%BA0.2%2C%E5%BD%93%E4%BE%9D%E6%AC%A1%E7%94%A818N%2C38N%2C58N%E5%92%8C78N%E7%9A%84%E6%B0%B4%E5%B9%B3%E6%8E%A8%E5%8A%9B%E6%8E%A8%E6%AD%A4%E7%89%A9%E4%BD%93%E6%97%B6%2C%E7%89%A9%E4%BD%93%E6%89%80%E5%8F%97%E5%88%B0%E7%9A%84%E6%91%A9%E6%93%A6%E5%8A%9B%E4%BE%9D%E6%AC%A1%E4%B8%BA%E5%A4%9A%E5%A4%A7%3F)
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