Keywords: Cavendish Torsion Balance Diagram.svg Diagram of torsion balance used in the Cavendish experiment performed by Henry Cavendish in 1798 It measured the force of gravity between masses M and m yielding the value of the gravitational constant G Labels M mass of stationary lead balls m mass of movable lead balls F gravitational force between each pair of balls <math>\theta</math> angle of deflection of balance from equilibrium position <math>\kappa</math> torsion spring coefficient r distance between centers of balls when balance is deflected L length of balance beam between centers of small balls See http //www fas harvard edu/~scdiroff/lds/NewtonianMechanics/CavendishExperiment/CavendishExperiment html Cavendish experiment Harvard Lecture Demonstrations Harvard Univ own Created with Inkscape 2007-08-31 Chris Burks Chetvorno thumb left German versionthumb left Versió en català Cavendish experiment |