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关于静摩擦力方向的分析刘敏（广西城建学校５４１００３）杨世英（桂林空军炮院５４１００３）如图，绕过圆心的定轴作匀速转动的水平圆盘上的Ａ’点有一小木块，木块随圆盘一起转动．我们知道，木块做匀速圆周运动所需的向心力是沿半径指向圆心的静摩擦力．对此结论一般...
Analysis of the direction of static friction Liu Min (Guangxi Urban Construction School, 541003) Yang Shiying (Guilin Air Force Gun Institute, 541003) As shown in the figure, a small wooden block and a wooden block are located on the horizontal disc at a constant speed around the center axis. Rotate with the disc. We know that the centripetal force required to make a uniform circular motion of a block of wood is the static friction that points along the radius toward the center of the circle. This conclusion is generally...