“验证机械能守恒定律”是非常重要的一个实验,课本上给出的实验方案是通过一个重物连接一条纸带做自由落体运动,采用如图1所示的实验装置。该方法存在的误差是纸带与打点计时器之间的摩擦引起的,所以重物减少的重力势能可能比增加的动能稍多一点,但此种方法简单、易操作,因此这种方法是经常采用的验证方法。笔者就高中物理中常见的几种验证机械能守恒定律的实验方法进行介绍,以期拓展学生的思维,丰富课堂内容。 “Verify the law of conservation of mechanical energy ” is a very important experiment, the textbook experimental program is given by a heavy weight to connect a strip of paper to do free-fall movement, using the experimental device shown in Figure 1. The error in the method is due to the friction between the paper strip and the timing timer so that the weight potential energy of the weight reduction may be a little more than the increased kinetic energy, but this method is simple and easy to handle and is therefore often Using the verification method. The author of several high school physics common to verify the experimental method of conservation of mechanical energy are introduced in order to expand the students’ thinking and enrich the content of the class.