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一、知识疏通1.在物理学中,把路程与运动时间之比叫做速度.速度用来表示物体运动的快慢,用符号v来表示.在相同时间内,物体经过的路程越长,它的速度就越快;物体经过相同的路程,所花的时间越短,速度越快.在匀速直线运动中,速度等于运动物体在单位时间内通过的路程.在物理学中,为了比较物体运动的快慢,采用“相同时间比较路程”的方法,也就是将物体运动的路程除以所用时间.这样,在比较不同运动物体的快慢时,可以保
First, the knowledge to clear 1. In physics, the distance and exercise time called the speed of speed is used to indicate the speed of the object movement, with the symbol v in the same time, the longer the object through the longer it The faster the speed; objects through the same distance, the shorter the time spent, the faster the speed in uniform linear motion, the speed equal to moving objects in the unit of time through the distance.In physics, in order to compare the movement of objects Speed, using “the same time the distance ” method, which is the object movement distance divided by the time used.Thus, when comparing the speed of different moving objects, you can protect