摘要
重力加速度是物理学中的一个重要的物理量。在地面不同的地区,重力加速度g值有所不同。准确地确定重力加速度的量值,无论从理论上、科研上、还是生产及军事上都有极其重大的意义。本文在现有的实验室条件下,用平衡法、单摆法、复摆法及倾斜气垫导轨法对其进行对比测量研究。平衡法、单摆法、复摆法、倾斜气垫导轨法所得重力加速度分别为(9.623±0.013)m/s2、(9.609±0.500)m/s2、(9.704±0.010)m/s2、(9.712±0.030)m/s2。结果显示,复摆法的合成不确定度最小,倾斜气垫导轨法的结果与当地的重力加速度(9.78995m/s2)最为接近,数据最为准确。就实验原理、操作难易程度、实验测试结果而言,倾斜气垫导轨法是测量重力加速度的最佳方法。
Acceleration of gravity is one of the important physical quantities in Physics. Different regions in the world have different values for the acceleration of gravity. Accurate determination of its numerical value has extremely important significance in theory, scientific research, production as well as military field. Based on conditions of the existing laboratory, the gravity has been measured and researched by using the balance method, the simple pendulum method, the compound pendulum method and the tilted air track method. The results shown that the acceleration of gravity are（9.623±0.013）m/s2,（9.609±0.500）m/s2,（9.712±0.030）m/s2and（9.704±0.010）m/s2for the balance method, the pendulum method, the simple pendulum method and the tilted air track method. The measurement uncertainty of the compound pendulum method is the least and the measurement of tilted air track method is most accurate and close to the local acceleration of gravity. Considering the principle of the experiment and the degree of easiness to operattion as well as other factors, tilted air track method is the most suitable method for measuring the acceleration of gravity in Qujing.
出处
《科技视界》
2013年第35期173-174,共2页
Science & Technology Vision
关键词
重力加速度
平衡法
单摆法
复摆法
气垫导轨法
Acceleration of gravity
Balance method
Simple pendulum method
Compound pendulum method
Tilted air track method
