Cavendish Experiment in the Cavendish balance apparatus shown in Fig. 12.4, suppose that m, = 1.10 kg, m2 = 25.0 kg, and the rod connecting the m, pairs is 30.0 cm long. If, in each pair, m, and m2 are 120 cm apart center-to-center, find
(a) The net force and
(b) The net torque (about the rotation axis) on the rotating part of the apparatus.
(c) Does it seem that the torque in part (b) would be enough to easily rotate the rod? Suggest some ways to improve the sensitivity of this experiment.