Velocity formula and acceleration formula of point in the plane graph is proved by means of complex vector,and a simple method to obtain the velocity and acceleration is proposed.

• 研究刚体的平面平行运动,用复矢量方法推导了平面图形内各点的速度、加速度关系式,给出了求解平面图形内各点速度、加速度的简捷方法。