变质量系统的模型运用

Model Application of Variable Mass System

变质量物体的运动方程中是否包括迁移物质所受外力,存在不同意见。近年来讨论反冲力和内力功时,又将这种外力明显表示出来。本文用多质点模型证明了变质量物体运动方程等表述式不含迁移物质所受外力,指出所谓包含是传统二质点模型缺陷导致的误解。

In discussion of the traditional understanding that the motion equation of variable mass objects must include the borne external force of removing objects, this paper thinks that is misunderstanding and proves that the borne external force of removing objects isn't included in the mention equation of variable mass objects.