相对运动中“三个物理量间的关系”可以小结如下.设物体A、物体B相对地面的位移分别是(?)、(?),物体A相对物体B的位移是(?),则有(?).设物体A、物体B相对地面的速度分别是(?)、(?),物体A相对物体B的速度是(?),则有(?).设物体A、物体B相对地面的加速度分别是(?)、(?),物体A相对物体B的加速 The relative movement of “the relationship between the three physical quantities ” can be summarized as follows: Suppose object A, object B relative ground displacement are (?), (?), Object A relative object B displacement is (?), Then (?), Object A, object B relative to the ground speed (?), (?), Object A relative to the speed of the object B is (?), Then The ground acceleration is (?), (?), Object A relative to the object B acceleration