19.如图所示在水平倾角为θ的圆锥面边缘上放着一质量为m的物体它和轴 的距离为r若圆锥绕轴以角速度ω转动试求物体不致掉下所需的最小 Template




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tomski19.如图所示在水平倾角为θ的圆锥面边缘上放着一质量为m的物体它和轴 的距离为r若圆锥绕轴以角速度ω转动试求物体不致掉下所需的最小 coloring