中学课本上有这样一道练习题,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?许多学生不能正确回答,究其原因,就是学生对加速度与速度的关系理解不透。我们知道,人的听觉对音高的刺激其灵敏度很高, There is such a practice in the middle school textbooks that a force is added to the object that was originally used for 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 cannot answer correctly. The reason is that students cannot understand the relationship between acceleration and speed. We know that human hearing is very sensitive to pitch stimuli,