受力分析是解决动力学问题的基石,而动力学问题是高中物理的重中之重,更是高考物理的热点和主要考查内容之一,但是很多同学虽然掌握了解决动力学问题的方法,甚至能够分析出物理过程从而列出方程,但是最终却得不到满分或者是不 Stress analysis is the cornerstone of solving kinetic problems, and kinetic problems are the top priority of physics in senior high schools. It is also one of the hot topics and the main content of examinations. However, although many students have mastered the methods of solving kinetic problems, Even physical processes can be analyzed to list the equations, but eventually they can not get full marks or not