A square metal plate 0.180 m on each side is pivoted about an axis through point O at its center and perpendicular to the plate (Figure 1) .
Calculate the net torque about this axis due to the three forces shown in the figure if the magnitudes of the forces are F1 = 25.0N , F2 = 15.5N , and F3 = 17.0N . The plate and all forces are in the plane of the page. Take positive torques to be counterclockwise.
2. Relevant equations
3. The attempt at a solution
[itex]rF2+rF3-rF1*sin(45) = .675[/itex], r=.09
Apparently that’s incorrect though, could anyone provide insight as to why?