本文所述的“圆周相对运动”,指一质点沿着光滑圆弧槽运动,而该圆槽又沿光滑水平地面作变速直线运动.这类问题知识覆盖面广,物理过程多,并可设计出多种情境,通过此类问题的讨论,对学生透彻理解力学的基本规律,锻炼思维能力,是很有帮助的。 The “circumferential relative motion” described in this paper means that a particle moves along a smooth circular arc groove, and the circular groove moves along a smooth horizontal surface in a variable speed linear motion. This type of problem knowledge covers a wide range of physical processes and can be designed. A variety of situations, through the discussion of such issues, is very helpful for students to thoroughly understand the basic laws of mechanics and exercise thinking ability.