关于点的合成运动中的两个问题

On Two Problems in Composite Movement or Points

本文讨论了在合成运动中，动点与动参考系的选取，相对运动轨迹对计算点的绝对速度和绝对加速度的影响．证明了相对运动轨迹只对点的绝对加速度计算有影响，阐明了选取动点和动参考系的原则．

This paper discusses how the dynamic points and the dynamic reference system are selscted in composite movement and how the relative motion paths influence the computational points' absolute velocity and absolute acceleration.It proves that the relative motion paths have an effect only on the absolute acceleration of the points.It also expounds the principle of selecting the dynamic points and dynamic reference system.