[模型概述]所谓“行星”模型指卫星绕中心天体运动。属圆周运动,但涉及到力和能的知识,属于每年高考必考内容。[模型讲解]例1.卫星做圆周运动,由于大气阻力的作用,其轨道的高度将逐渐变化(由于高度变化很缓慢,变化过程中的任一时刻,仍可认为卫星满足匀速圆周运动的规律),下述关于卫星运动的 [Model Overview] The so-called “planets” model refers to the movements of satellites around a central celestial body. Is a circular movement, but the power and knowledge related to the knowledge, belonging to the annual college entrance examination will be content. [Explanation of Model] Example 1. A satellite makes a circular motion. Due to the action of atmospheric resistance, its orbit height will gradually change (since the altitude changes very slowly, the satellite can still be considered to meet the law of uniform circular motion at any time during the change process ), The following on the satellite movement