一道变质量力学问题的分析与讨论

Analysis and Discussion on A Mechanics Issue about Variable Mass

对一道求解变质量体系中力学问题的解答进行了分析,发现解答过程不是很完整.文中给出了一些必要的补充和说明,并利用动量定理对变质量体系中受力突变问题进行了分析和解释.

The key to a mechanics problem about variable mass is analyzed in this paper,and found solution process is not complete. This paper gives some necessary supplement and explanations,and change of force is analyzed and explained in variable mass system using the momentum theorem. that the sudden