一、问:如何判定物体是运动的,还是静止的? 答:选择合适的参照物,然后根据机械运动的含义来判断物体是运动的,还是静止的. 解析:由于运动和静止具有相对性,所以在判别物体的运动状态前,应先选择合适的参照物,然后根据机械运动的概念,即物体位置的变化来判断.若被研究的物体相对于所选定的参照物有位置的 First, ask: How to determine whether the object is moving or still? Answer: Select the appropriate reference object, and then determine whether the object is moving or stationary according to the meaning of mechanical motion. Resolution: Because motion and still have relative, Therefore, before judging the motion state of an object, a suitable reference object should be selected first, and then be judged according to the concept of mechanical motion, that is, the change in the position of the object. If the object being studied has a position relative to the selected reference object.