陈奎孚,姚海蓉,张云文

• 1:中国农业大学理学院
• 2:中国农业大学工学院

摘要(Abstract)：

摩擦力既是教学的重点,更是教学的难点,特别是静摩擦力的指向确定。文章将阐述:首先,就计算而言,静摩擦力指向确定并不重要;第二,对某些动力学问题,主动力信息不足以唯一确定静摩擦力的指向;第三,在某些特殊条件下,比如运动刚体的质心位于接触点法线上(如无质量偏心的圆柱),由主动力向撞击中心简化的主矩可确定静摩擦力的指向;第四,把摩擦面假想成光滑面后,运动刚体在接触点的切向加速度指向与该处静摩擦力的指向相反。

关键词(KeyWords)： 静摩擦力;受力分析;受力图;达朗贝尔原理;撞击中心

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 陈奎孚,姚海蓉,张云文

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