如图所示.在倾角为θ的斜面上质量为m的物体在水平力f作用下处于静止状态.1斜面对物块的正压力2地面对斜面的�擦力. 题目和参考答案 Template




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tomski如图所示.在倾角为θ的斜面上质量为m的物体在水平力f作用下处于静止状态.1斜面对物块的正压力2地面对斜面的�擦力. 题目和参考答案 coloring