碰撞中的动量守恒实验是高中物理选修本第三册上的第四个学生分组实验，碰撞实验器主要用于验证动量守恒定律。我们针对往年实验中一些较为突出的问题进行了改进，取得了令人满意的效果，现介绍如下（以J２１３５型碰撞实验器为例）。１以往实验中存在的问题a．实验要求将斜槽 The momentum conservation experiment in collision is the fourth student grouping experiment in the third book of high school physics elective. The collision experimenter is mainly used to verify the law of conservation of momentum. We have improved some of the more prominent problems in previous years’ experiments and achieved satisfactory results. The following is introduced (using the J2135 crash tester as an example). 1 existing problems in the experiment a. The experiment requires a chute