依据参照物描述物体的运动是解决运动问题的基石.由于有些同学对参照物的概念、运动和静止的含义及运动相对性的理解不到位,受到思维定势的干扰,往往导致错解出现.易错点一:对参照物的选择易错参照物是人们用来判断一个物体是否运动而取为标准的物体,是为了研究问题,事先假定为不动物体.机械运动就是指物体相对于参照物的位置变物体相对于参照物位置有变化,该物体是运动的;体相对于参照物位置没有变化.物体就是静止的. Describing the motion of an object based on a reference object is the cornerstone of solving the problem of movement, which is often misunderstood by some students due to the lack of understanding of the concept of the reference object, the meaning of motion and rest, and the relativity of motion. Error-prone point one: the choice of reference object Error-prone reference object is used to determine whether an object is moving as a standard object, is to study the problem, presumed to be non-moving object .Machine movement refers to the object relative to the reference Position of the object The object changes in relation to the position of the reference object, which object is in motion; there is no change in the position of the object relative to the reference object. The object is stationary.