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在《摩擦力》这一课的教学中,我根据教学内容,利用被手推了一下的木块在运行一段距离后自行停下来这一现象引出课题后,教学生依次进行了三个实验:①滑动摩擦力的测量;②滑动摩擦力的大小跟接触面粗糙程度的关系;③滚动摩擦力的测量,并和滑动摩擦力的大小进行比较。就这样按照实验顺序逐步得出了结论,最后对摩擦力的利与弊进行分析讨论。在整个教学过程中,学生实验也做了,结论也得
In the teaching of “Friction”, according to the teaching content, after using the phenomenon that the hand-pushed block stopped itself after running a distance, the teaching students carried out three experiments in turn: ① measurement of sliding friction; ② the size of sliding friction with the roughness of the contact surface; ③ rolling friction measurement, and the size of sliding friction compared. So in accordance with the experimental sequence gradually come to the conclusion, the final analysis of the pros and cons of friction. Throughout the teaching process, students experiment done, the conclusion also had