观察图1和图2,发现这两个物体的运动有这样的共同点: 前一阶段的初速度与后一阶段的末速度相等,前一阶段的末速度与后一阶段的初速度也相等.由匀变速直线运动公式v=vt+v0/2,可得出如下结论: 前一阶段的平均速度等于后一阶段的平均速度,也等于整个运动过程的平均速度,均为v0/2,即 Observing Fig. 1 and Fig. 2, we find that the motions of these two objects have this in common: The initial speed of the previous stage is equal to the final speed of the later stage. The final speed of the previous stage is also equal to the initial speed of the later stage. From the uniform linear motion formula v=vt+v0/2, the following conclusion can be drawn: The average speed in the previous stage is equal to the average speed in the latter stage, and it is also equal to the average speed in the entire movement process. Both are v0/2. which is