变质量物体运动微分方程应用探讨

Discussion on Differential Equation Application of Motion of Variable Mass

对变质量物体的运动微分方程的应用进行了分析,指出其中受力F和微质量dm的速度u容易出现的错误,纠正了某些错误看法,并给出了用此类方法解题时的注意事项。

After an analysis on the application of differential equation of motion of variable mass, the mistakes which may appear frequently in the speeds u^→ of the acceptor of the force F and the micro-quality are pointed out. Then some wrong viewpoints are corrected which appeared in some reference books. In addition, matters which need attention are addressed in this kind of application.