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题目.一圆盘可以绕其竖直轴在水平面内转动,圆盘半径为R,甲、乙两物体的质量分别为M与m(Mm),它们与圆盘之间的最大静摩擦力均为正压力的μ倍,两物体用一根长为l(lR)的轻绳连在一起,如图1所示.若将甲物体放在转轴的位置上,甲、乙之间轻绳刚好沿半径方向拉直,要使两物体与转盘
A disc can rotate about its vertical axis in a horizontal plane, the radius of the disc is R, the masses of A and B are respectively M and M (Mm), the maximum static friction between them and the disc is Μ times the positive pressure, the two objects with a length of l (lR) light rope connected together, as shown in Figure 1. If the object on the shaft position, A, B just between the light rope along Radial straightening, to make two objects and turntable