Figure 10.1 A light triangular plate OAB is in a horizontal plane. Three forces, F1 = 8 N, F2 = 5 N, and F3 = 5 N, act on the plate, which is pivoted about a vertical axis through point O. In Figure 10.1, the torque of force F1 about the axis through point O is closest to: 3.0 N middot m 3.6 N middot m 4.2 N middot m 2.4 N middot m 4.8 N middot m