选择不同的参照系往往可以使物理问题的解题过程大大简化,还有利于提高学生的思维能力,所以变换参照系解物理问题要予以重视。我们往往喜欢选择静止的物体做参照系,但有时选择匀速运动的物体或选择有加速度的物体做参照系会收到意想不到的效果。 Selecting different reference systems can often simplify the problem solving process of physical problems, and it is also helpful to improve the students’ thinking ability. Therefore, attention should be paid to changing the reference system to solving physical problems. We often prefer to select a stationary object to be the reference system, but sometimes selecting an object that moves at a constant speed or selecting an object that has acceleration as the reference system will give unexpected results.