Measurement of the Newtonian gravitational constant based on the principle of free fall |
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Authors: | Yong Wang XiaoPing Ke WeiMin Zhang HouZe Xu HuBiao Wang Hua Chai |
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Institution: | (1) Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, 430077, China |
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Abstract: | The Newtonian gravitational constant (G) is one of the fundamental physical constants. This paper introduces a method to determine the Newtonian gravitational constant
based on the principle of free fall, through measuring the change of gravity from the disturbed mass with an FG5/112 absolute
gravimeter. This method has good repeatability. The measurement precision can be improved by error control and a large number
of experiments. The constant G is obtained by two experiments, and the measured value is (6.6665±0.0554)×10−11 m3/(kg·s2).
Supported by the National Basic Research Program of China (Grant No. 2003CB716300) and Key Project of the Knowledge Innovation
Program of the Chinese Academy of Sciences (Grant No. KZCX2-YW-125) |
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Keywords: | Newton gravitational constant absolute gravimeter free fall |
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