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地球表面的重力加速度ｇ为 9.8ｍ/ｓ2 ,这一常量除了在重力和质量的关系式和抛体运动中有直接应用外 ,还有一个重要的应用是在天体问题中利用它求地球的质量 ,像这类应用在 1 997年至 2 0 0 0年连续四年的全国高考物理中都有 .一、ｇ和星球质量间的关系在中学物理中认为星球表
The gravitational acceleration g of the Earth’s surface is 9.8m/s2. This constant has a direct application in addition to the relationship between gravity and mass and the movement of a projectile. An important application is to use it to determine the quality of the Earth in celestial problems. , Such applications like this have been in the national college entrance examination physics from 1 997 to 2000 for four consecutive years. The relationship between g, and the quality of the planet in the middle school physics that the planet table