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本文以“平抛运动”复习实践为例,就如何有效复习进行分析。一、直观呈现基本规律在复习平抛运动的基本规律时,笔者引导学生复习轨迹图(如图1所示),将各个物理量从图中表征出来。图1是学生最为熟悉的轨迹图。从图形出发,引导学生运用运动的独立性,找到平抛运动中的位移关系和速度关系。从图像表征出发,得出两条推论:(1)做平抛(或类平抛)运动的物体任一时刻的瞬时速度
This paper takes “Pingtan Sports” review practice as an example to analyze how to review effectively. First, the basic law of visual presentation In reviewing the basic law of flat throwing movement, I guide students to review the trajectory (Figure 1), the physical quantities from the figure is characterized. Figure 1 is the most familiar trajectory for students. From the graphic, guiding students to use the independence of the movement to find the relationship between displacement and speed in the flat throw movement. Starting from the image representation, we draw two corollaries: (1) the instantaneous velocity at any moment of the object to be flattened (or flattened)