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在物理学中,用速度来描述物体运动的快慢,其大小等于物体在单位时间内所通过的路程.如果物体运动快慢和运动方向都不变,这种沿着直线快慢不变的运动叫匀速直线运动.常见的物体运动都是变速的.为了把复杂问题简化处理,可以用平均速度粗略地表示变速运动的快慢.物体在某一段路程内(或某一段时间内)的运动快慢程度叫平均速度.平均速度的公式是v=s/t.也常写作v=s/t.
In physics, the speed is used to describe the speed of an object, its size is equal to the distance traveled by the object in a unit of time.If the speed of the object and the direction of the movement are the same, the movement along the straight line is called constant speed In order to simplify the complex problems, the average speed can be used to roughly indicate the speed of the speed change.The speed of an object within a certain distance (or a certain period of time) is called the average Speed. The average speed of the formula is v = s / t. Also often written as v = s / t.