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万有引力知识的应用,关键是要把握好一个中心思想——万有引力提供天体做圆周运动的向心力;两个基本方程——一是万有引力近似等于星体表面物体的重力的“黄金代换”方程;二是赤道处随地球自转的物体的向心力方程.但是如果对于和本章有联系的知识的掌握和理解不够深入以及忽视星体的自转问题,那么在解决问题时就容易造成失误,本文试从以下几个学生易错的典型问题进行分析和说明.
The key to the application of universal gravitation knowledge is to grasp a central idea—gravitational force provides the centripetal force of the circular motion; two basic equations—one is the “golden substitution” equation where the gravitational force is approximately equal to the gravity of an object on the surface of the star; The second is the centripetal force equation of an object that rotates with the earth at the equator. However, if the knowledge and understanding of the knowledge associated with this chapter is not thorough enough and the problem of the rotation of the star body is neglected, then it is easy to cause mistakes when solving the problem. The typical problems of student error are analyzed and explained.