一、问题的提出牛顿运动定律中弹簧类问题是高中物理中常见的一类问题,学生对这类问题比较头疼,因为在学生看来弹簧问题应该是很简单的胡克定律应用问题,但在实际习题中常常涉及弹簧弹力的不变、突变与渐变,在没有认清弹簧弹力变化实质原因情况很难准确解析这些弹簧类问题。在此,笔者觉得很有必要将弹簧的弹力变化原因进行归类分析,建立清晰的弹簧模型,便于学生解决牛顿运动定律中弹簧类问题有章可循。二、瞬时状态下的弹簧弹力变化1.弹力不变现象在高中物理中涉及到的弹簧都是轻质弹簧,弹 First, the problem raised Newton’s law of motion spring class is a common high school physics problems, students are more headaches on such issues, because students think the spring problem should be a very simple application of Hooke’s law, but in the The actual exercises often involve constant, abrupt and gradual change of spring force. It is very difficult to accurately analyze these spring-like problems without knowing exactly the cause of the elastic change of spring. At this point, I think it is necessary to spring the elastic analysis of the causes of change, the establishment of a clear spring model to facilitate students to solve Newton’s laws of spring chapter rules to follow. Second, the instantaneous state of the spring elastic changes 1. Elastic constant phenomenon involved in the physics of high school are lightweight springs, shells