在高中物理里引入矢量概念 ,矢量具有大小和方向 ,矢量的合成与分解服从平行四边形定则 .矢量还具有等价性、独立性 .矢量等价性是指在空间各方向上是等价的 ,并不存在特殊方向 ;矢量独立性是指矢量之间互不干扰 ,彼此独立 .利用矢量性质 ,可以简化复杂的力学问题 .以下举例说 Introducing the concept of vector in high school physics, the vector has size and direction, and the synthesis and decomposition of vector obeys the parallelogram rule. The vector also has equivalence and independence. Vector equivalence means that it is equivalent in all directions of space. There is no special direction; vector independence means that vectors do not interfere with each other and are independent of each other. Using vector properties can simplify complicated mechanical problems.