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平抛运动是水平方向的匀速直线运动和竖直方向的自由落体运动的合运动, 其水平方向的平均速度是水平匀速运动的速度,竖直方向的平均速度是初速为零 的匀加速直线运动的平均速度.利用两分运动的等时性,能给解题带来方便.
The flat throwing motion is the combined motion of the horizontal uniform linear motion and the vertical free-fall motion. The horizontal average velocity is the horizontal uniform motion velocity, and the vertical average velocity is the initial velocity zero uniform acceleration linear motion. The average speed. Using the isochronism of the two points movement can bring convenience to the problem solving.