static friction force

基本解释

It is one of the difficult points of physics teaching to ask the static friction force of solving.
为解决静摩擦力难以判断的问题，提出了概念判断法、加速度判断法、综合分析法等方法。
From the common mechanical phenomenon, present a theoretical method on how to judge the direction of static friction force.
本文以常见的力学现象为例，从理论上阐述判断静摩擦力方向的方法及作功问题的证明方法。
This text has probed into the basic way that stat ic friction force is judged, Try hard to solve problem and dispel suspicion for the teaching of static friction force.
文章探讨了静摩擦力判断的基本途径，力图为静摩擦力的教学解难释疑。