质量为m的物体静止在倾角为θ的斜面上如图所示.已知物体和斜面间的动�擦因数为μ则物体受到的�擦力为 .若物体在斜面上匀速下�则μ与θ间的 Template




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tomski质量为m的物体静止在倾角为θ的斜面上如图所示.已知物体和斜面间的动�擦因数为μ则物体受到的�擦力为 .若物体在斜面上匀速下�则μ与θ间的 coloring