物理图象能形象、直观地描述物理过程,揭示各物理量之间的关系.在运用s-t和v-t图象解决物体的运动问题时,同学们要理解图象的物理意义,会根据图象判断物体的运动状态,还要能利用图象进行计算.理解s-t和v-t图象的物理意义s-t图象描述的是物体通过的路程随时间变化的规律,如图1,分析图象时要注意:①图象中的水平线a表示物体处于静止状态,物体的速度 Physical image can describe the physical process intuitively and reveal the relationship between each physical quantity.In the use of st and vt images to solve the problem of movement of objects, students should understand the physical meaning of the image, according to the image to determine the object The state of motion, but also can use the image to calculate.Stat and vt understand the physical meaning of the image st image describes the object through the distance changes over time, as shown in Figure 1, the analysis of the image should pay attention to: ① The horizontal line a in the image shows the object at rest, the speed of the object