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学习是为了创新并解决实际问题。在高中分组实验教学过程中,笔者发现高中学生研究平抛运动规律是利用描点法得出小球运动轨迹,建立坐标后选择曲线中适当的点进行研究,从而得出平抛规律。在学生研究平抛规律实验课上,学生花费了很多时间去寻求平抛小球的轨迹(在操作过程中,小球每次都要从同一高度下降以获得相同的初速度,实际上即使从同一处释放小球运动的轨迹也未必重合),同时也花费了较多的时间寻找小球与铅笔的碰撞点。
Learning is to innovate and solve practical problems. In high school experimental teaching process, I found that high school students study flat throwing law is the use of tracing method derived ball trajectory, the establishment of coordinates select the appropriate point in the curve to study, to draw flat throw law. Students in the flat-throw law of the experimental class, the students spent a lot of time to find the trajectory of flat throwing the ball (in operation, the ball from the same height to get the same initial velocity, in fact, even from The same trajectory of releasing the ball movement may not coincide), but also spent more time to find the ball and pencil collision point.