评“相对论的质心运动定理”  

Comments on "relativistic theorem for the motion of center of mass"

作　　者：关洪[1] 

机构地区：[1]中山大学物理系,广州510275

出　　处：《大学物理》2005年第11期27-27,30,共2页College Physics

摘　　要：在相对论情况下,质点系统的质心是一个不确定的概念.在相对论力学中,质心系(质量中心参照系)亦被有确切定义的动量中心系(系统总动量为零的参照系)所代替.本文对《相对论的质心运动定理与质量亏损》一文的论证和结果作出了评论.The center of mass is not a certain concept in relativity theory. In relativistic mechanics, center of mass system is replaced by center of momentum system（the reference system in which the total momentum of a physical system equals zero）. The arguments and conclusions in the paper“Relativistic theorem for the motion of center of mass and the mass defect”are commented.

关 键 词：质心 动量中心参照系 相对论力学 

分 类 号：O412[理学—理论物理]