Halliday, Resnick & Walker — Equilibrium and Elasticity: Problem Problem_8

A physics Brady Bunch, whose weights in newtons are indicated in Fig. 12.13, is balanced on a seesaw. The weights and positions from the central fulcrum \( f \) are as follows: Person 1 (220 N at 4 m left), Person 2 (330 N at 3 m left), Person 3 (440 N at 2 m left), Person 4 (560 N at 1 m left), Person 5 (560 N at 1 m right), Person 6 (440 N at 2 m right), Person 7 (330 N at 3 m right), and Person 8 (220 N at 4 m right). What is the number of the person who causes the largest torque about the rotation axis at fulcrum \( f \) directed (a) out of the page and (b) into the page?