变质量问题的实质分析  

Essential Analysis on Variable Mass

作　　者：邵贵成[1] 

机构地区：[1]忻州师范学院物理系,山西忻州034000

出　　处：《山西师范大学学报（自然科学版）》2010年第3期54-57,共4页Journal of Shanxi Normal University(Natural Science Edition)

基　　金：山西省教育厅2009年度高等教育教学改革研究项目(292);山西省教育科学"十一五"规划课题(GH-09142)

摘　　要：变质量问题是常见的一类力学问题.文章就一般文献中论述的变质量问题,指出在牛顿力学范围内所谓变质量系统的质量其实是不变的,所谓"变"是由于变更研究对象导致的结果;然后根据质点或质点系动量定理对此问题进行了较为详尽的实质分析,得出了同样的结果,并对其进行了讨论;最后通过经典实例说明了此类问题的求解方法,同时也对相关文献中有关此问题的模糊认识给予了澄清.Variable Mass is one of the most common problems in mechanics.For the problem on variable mass mentioned in some references,it is shown that the mass of the system which is spoken as ＂ariable＂ is invariable in Newtonian Mechanics as a matter of fact.And the variety of subject suggested leads to the ＂variety＂ of mass.On the basis of momentum theorem on particle and system of particles,this problem is essentially analyzed in detail and the result which is also discussed in our article is as same as the above.Finally,solution method on this problem is given here through a typical instance,and at the same time,a dim consciousness of this problem in some correlative references is cleared.

关 键 词：变质量 主体 微元 动量定理 

分 类 号：O313.6[理学—一般力学与力学基础]