【摘要】 用相对运动的观点,建立运动坐标系,来解运动学和动力学的问题比较明晰简便。本文采用这样的方法解在河水中划船追寻失落的渔杆的问题,导弹追击飞机的问题,以及变长摆的问题的几个典型例子。这种解法明显地比用静止坐标系的方法简捷。更多还原

【Abstract】 From the viewpoint of relative motion,often it is easier and clearer td solve problems about kinematics and dynamics in the method of setting up coordinate system of motion.With this method to solve problems, there are such typical examples as searching lose fishing rod by paddling in the flowing water, guided missile’s pursuing and attacking airplane, and the pendulum which length of the string is changable during the oscillatory peviod. It is obviously simpler and directer in this way to solve problems than with the static coordinatesystem.更多还原