A Simple Pendulum Determination of the Gravitational Constant

Details A Simple Pendulum Determination of the Gravitational Constant A Simple Pendulum Determination of the Gravitational Constant

2010-08-19

arxiv.org/abs/1008.3203v3

Phys. Rev. Lett. 105, 110801 (2010)

Physics

Classical Physics

10 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.105.110801

We determined the Newtonian Constant of Gravitation G by interferometrically measuring the change in spacing between two free-hanging pendulum masses caused by the gravitational field from large tungsten source masses. We find a value for G of (6.672 34 +/- 0.000 14) x 10^-11 m^3 kg^-1 s^-2. This value is in good agreement with the 1986 Committee on Data for Science and Technology (CODATA) value of (6.672 59 +/- 0.000 85) x 10^-11 m^3 kg^-1 s^-2 [Rev. Mod. Phys. 59, 1121 (1987)] but differs from some more recent determinations as well as the latest CODATA recommendation of (6.674 28 +/- 0.000 67) x 10^-11 m^3 kg^-1 s^-2 [Rev. Mod. Phys. 80, 633 (2008)].

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