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在进行匀速圆周运动的教学时,学生虽已具备匀变速直线运动的知识,但对曲线运动的特点却是陌生的。因此,首先通过运动的合成与分解,分析一下抛体运动的规律,从而使学生了解质点作曲线运动的条件是非常必要的。对此可以在复习匀变速直线运动的基础上进行。当加速度的方向与初速度的方向一致时,质点作加速运动;当加速度的方向与初速度的方向相
In the teaching of uniform circular motion, although students have the knowledge of uniform linear motion, they are unfamiliar with the characteristics of curve motion. Therefore, firstly, through the synthesis and decomposition of the movement, the laws of the motion of the throwing body are analyzed, so that it is very necessary for the students to understand the condition of the point as the curve motion. This can be done on the basis of reviewing the linear motion of uniform speed. When the direction of the acceleration coincides with the direction of the initial speed, the mass point acts as an acceleration; when the direction of acceleration coincides with the direction of the initial speed