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平均速度是初中物理中的难点,许多同学求解时经常出现差错. 首先要理解平均速度的概念,在变速运动中,物体的运动快慢是经常变化的.为了粗略地表示物体运动的快慢的大致情况,引入平均速度的概念.平均速度在数值上等于运动物体通过的这段路程跟通过这段路程所用时间的比
The average speed is the difficulty in junior high school physics. Many students often make mistakes when solving. First of all, we must understand the concept of average speed. In the speed-changing movement, the speed of the object changes frequently. In order to roughly represent the speed of the object movement The concept of average speed is introduced. The average speed is numerically equal to the ratio of the distance traveled by a moving object to the time it takes to travel through this distance.