Attitude is just as important as ability!圆周运动动画版Attitude is just as important as ability!匀速圆周运动圆周运动特征：质点的轨迹是圆周、具有周期性Attitude is just as important as ability!运动轨迹是圆周的运动叫圆周运动Attitude is just as important as ability!思考与讨论自行车的轮盘，飞轮，后轮中的质点都在做圆周运动。哪些点运动得更快些？Attitude is just as important as ability! 我们曾经用速度这个概念来描述物体做直线运动时的快慢，那么我们能否继续用这个概念来描述圆周运动的快慢呢？如果能，该怎样定义？下面就请同学们自主学习课本第16-17页上有关线速度的内容：一. 线速度Attitude is just as important as ability!阅读提纲线速度的物理意义；线速度的定义（和直线运动中速度定义的比较）线速度的定义式；线速度的瞬时性；线速度的方向；匀速圆周运动的“匀速”
