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Reviewed CSCA STEM Chinese question · Easy

在物理学中,“位移”和“路程”是两个不同的概念。下列关于两者的说法,正确的是:

  1. 位移是矢量,路程是标量
  2. 位移是标量,路程是矢量
  3. 位移和路程都是矢量
  4. 位移和路程都是标量
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Correct answer

A. 位移是矢量,路程是标量

Principle or equation

位移是描述物体位置变化的物理量,是矢量;路程是物体运动轨迹的长度,是标量。

Why this answer is correct

位移既有大小又有方向,是矢量;路程只有大小没有方向,是标量。

Example

物体沿圆周运动一周,位移为零,路程等于圆周长。

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