一輛汽車在運(yùn)動(dòng)中始終沿一直線向同一方向行駛，有人說“汽車的位移就是它行駛的路程”.這種說法是否正確?

思路解析：這種說法沒有弄清楚位移和路程的區(qū)別，位移是矢量，路程是標(biāo)量，它們是不可能等同的.談到位移，就一定是一個(gè)有方向的物理量.

答案：這種說法是錯(cuò)誤的，應(yīng)該說位移的大小等于路程.

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