摘要
给出变质量质点的动能定理和一对反推内力作功的表达式，并由此给出软绳问题的正确解释．
A theorem on kinetic energy for variable mass-point and formula of work of recoil internal forces are given and the reason of soft-rope query is discussed.
出处
《大学物理》
1999年第3期22-23,27,共3页
College Physics
关键词
变质量质点
动能定理
反推内力作功
软绳问题
variable mass-point
theorem of kinetic energy
work of recoil internal forces
soft-rope query
