在进行“平抛运动”教学时,教师一般都会用小球进行演示,让学生认识什么是平抛运动.但因平抛是一种加速运动,空中运动的时间很短,故学生很难看清楚;而且,即使能看清楚也只能看一个大概轨迹,至于其运动特点则无从探究.如果利用平抛运动演示仪做实验,则其收集数据的过程又太繁琐,做多次实验要非常小心,其中一个环节出错就会导致整个实验结果出现较大偏差.笔者受频闪照相的启发想到:如果能把小球的运动过程每隔 In the “flat throwing exercise” teaching, teachers usually use a small ball to demonstrate, let students understand what is the flat throwing movement. But because the flat throw is an accelerated movement, the time of the air movement is very short, so the students are very It is difficult to see clearly; moreover, even if one can see clearly, one can only look at one approximate trajectory. As for the characteristics of its movement, there is no way to explore it. If you use the flat throw motion demonstration instrument to do experiments, the process of collecting data is too tedious. Be very careful, one of the links error will lead to a larger deviation of the entire experimental results. The author was inspired by the stroboscopic photography thought: If you can put the ball movement process every other