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题一小圆盘静止在桌布上,位于一方桌的水平桌面的中央,桌布的一边与桌的AB边重合,如图1所示,已知盘与桌布间的动摩擦因数为μ1,盘与桌面间的动摩擦因数为μ2.现突然以恒定加速度α将桌布抽离桌面,加速度方向水平
A small disk rests on the tablecloth and is located in the center of a horizontal table on a side table. The side of the tablecloth coincides with the AB side of the table. As shown in FIG. 1, the dynamic friction coefficient between the plate and the table cloth is known as μ1. The dynamic friction coefficient is μ2. The tablecloth is suddenly pulled off the table with a constant acceleration α. The acceleration direction is horizontal.