1问题的提出近代力学创始人伽利略相信,自然界是简单的,自然界的规律也是简单的.他从这个信念出发,猜想落体也一定是一种最简单的变速运动,它的速度应该是均匀变化的.但是,速度的变化怎样才算“均匀”呢?他考虑了两种可能:一种是速度的变化对位移来说是均匀的,即v∝s,例如,每下落1m,速度的变化量都是2m/s;另一种是速度的变化对 1 PROBLEM PROBLEM Galileo, the founder of modern mechanics, believes that nature is simple and that the law of nature is simple. From this conviction, he assumes that the fall must be one of the simplest speed-changing motions, and its speed should be uniform But how does the change in velocity be called “uniform?” He considers two possibilities: one is that the change in velocity is uniform to the displacement, vαs, for example, every 1m drop in velocity The amount of change is 2m / s; the other is the speed of change