题目:已知地球半径约为6.4X10~(6)米,又知月球绕地球运动可近似看作匀速圆周运动,则可估算出月球到地心的距离约为米.(结果只保留一位有效数字)这是一道典型的应用万有引力定律解决天体运动问题的题目,这道题目得分率很低,不少同学解不到底,其原因是没有掌握这类题型的解题思路. Title: It is known that the radius of the earth is approximately 6.4×10 6 m. Also, knowing that the moon’s movement around the earth can be approximated as a uniform circular motion, it can be estimated that the distance from the moon to the center of the earth is approximately m. (The result is only reserved. Effective number) This is a typical application of the law of universal gravitation to solve the problems of celestial body movement. The score rate of this topic is very low, and many students cannot solve the problem. The reason is that there is no such problem-solving mentality.