用动能定理对一例弹簧问题的求解

Solution of a Spring Problem by Kinetic Energy Theorem

摘要: 弹簧是大学物理教学和学习当中的重要模型之一。本文通过运用动能定理，对弹簧问题的一个典型例题进行了重新求解。并对比弹簧振子模型，运用质心运动定理对解题思路进行了详细地阐述。同时指出文中解题思路是对弹簧振子模型的进一步推广。这对于拓宽思路、加深对动能定理和与弹簧模型相关问题的理解具有一定的现实意义。

Abstract: Spring is one of the important models in college physics teaching and learning. In this paper, a typical example of spring problems is resolved by using the kinetic energy theorem. Compared with the spring vibrator model, the idea of solving the problem is described in detail by using the theorem of mass center motion. At the same time, it is pointed out that the problem-solving idea in this paper is a further generalization of the spring vibrator model. This has certain practical significance for broadening the thinking and understanding of the kinetic energy theorem and the problems related to the spring model.