在牛顿运动定律的应用中,学生常出现忽视全面分析物体的运动过程及某些物理量的“突变”情况,很容易得出错误的结论,因此要慎防掉进瞬间“突变”的陷阱.所谓的“突变”问题,主要是由于力的性质、大小或方向的“突变”而引起的问题,具体主要有性质突变、状 In the application of Newton’s law of motion, students often appear to ignore the comprehensive analysis of the object’s movement process and the “mutation” of certain physical quantities. It is easy to draw wrong conclusions. Therefore, we must be careful of falling into the sudden “mutation”. The trap. The so-called “mutation” problem is mainly caused by the “mutation” of the nature, size, or direction of the force. The main ones are mutations,