One way is to just use your common sense and realize that if you push it this way, these two guys are going to move together.
第一种方法就是你可以通过常识感觉到,如果你这样推它,这两个物体会一起运动
耶鲁公开课 - 基础物理课程节选
应用推荐
模块上移
模块下移
不移动