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近年来高考试题中的天体运动问题,试题情境熟悉,运算简单,大多数试题直接运用开普勒第三定律、万有引力定律进行分析或计算,有些试题则需运用牛顿第二定律与万有引力定律、“黄金代换”、圆周运动等知识结合分析计算。例1火星直径约为地球的一半,质量约为地球的十分之一,它绕太阳公转的轨道半径约为地球公转半径的1.5倍。根据以上数据,以下说法正确的是()A.火星表面重力加速度的数值比地球表面小B.火星公转的周期比地球的长C.火星公转的线速度比地球的大
In recent years, the college entrance examination examination questions in the celestial movement problems, familiar with the test scenario, simple operation, most of the questions directly using Kepler’s third law, the law of gravity for analysis or calculation, some questions need to use Newton’s second law and the law of universal gravitation, “Gold substitution ”, circular movement and other knowledge combined with analysis and calculation. Example 1 Mars is about half the diameter of Earth, about one tenth of the Earth’s mass, and its orbiting radius around the Sun is about 1.5 times the Earth’s radius of revolution. According to the above data, the following statement is correct () A. Mars surface gravity acceleration value is smaller than the surface of the earth B. Mars revolution period longer than the Earth C. Mars revolution of the linear velocity greater than the Earth