高中物理上册第89页的研究牛顿第二定律实验装置如图所示,取两个质量相同的小车,放在光滑的平面上,小车的一端拴上细绳,跨过定滑轮,下面挂着小盘,盘中的砝码数改变,小车受到的外力就改变,小车的另一端也拴上绳子,并用夹子夹住。为了研究这两个小车在不同的恒定拉力作用下,加速度是怎样的,进行了如下的操作:打开夹子,让两个小车同时从静止开始做匀 High school physics book page 89 research Newton’s second law experimental device as shown in the figure, take two cars of the same quality, on a smooth plane, the end of the car with a string, crossed the fixed pulley, hung below In the small plate, the number of weights in the plate is changed, the external force of the car is changed, and the other end of the car is also tied with a rope and clamped with clips. In order to study how these two cars act under different constant tensions, what the acceleration is like, the following operations are performed: Open the clamps and let the two cars do their work from the same time.