⑧简单的运动【知识要点】一、机械运动和参照物1.物理学里把物体叫机械运动.在判断物体位置是否发生变化时,被选作标准的物体叫.2.同一个物体是运动还是静止,取决于所选的.这就是运动和静止的.两运动物体相对静止的条件是、.二、匀速直线运动和速度1.不变、经过的路线是的运动 8 Simple Movements [Knowledge Points] 1. Mechanical Movements and References 1. In physics, objects are called mechanical movements. When it is determined whether an object’s position changes, the object selected as the standard is called. 2. The same object is a motion. Still still, depending on the choice. This is the movement and the rest. The conditions for the relative motion of two moving objects are, 2. The uniform linear motion and the speed 1. The constant, the passing route is the movement