中学教材中,常会出现这样的问题,在原来作匀速直线运动的物体上加上一个力,方向和运动方向一致,如果这个力越来越小,那物体的速度将减小还是增大?为什么?许多学生弄不明白,究其原因,就是对加速度与速度的关系理解不够。本人设计了如下两组实验,效果很好。1实验方法一在一辆沿斜 In high school textbooks, such problems often arise. Adding a force to an object that was originally a uniform linear motion, the direction is the same as the direction of motion. If the force is getting smaller and smaller, will the speed of the object decrease or increase? Why? Many students do not understand, the reason is that the understanding of the relationship between acceleration and speed is not enough. I designed the following two sets of experiments and the results were very good. 1 experimental method one on one along the ramp