1. The problem statement, all variables and given/known data http://online.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys211/oldexams/exam3/sp08/fig10.gif [Broken] What's the net torques about the pivot, represented by the dot (•), in the diagram D. The solid arrows represent the magnitude and direction of the forces applied to the objects. 2. Relevant equations 3. The attempt at a solution I thought it's just F0 multiplied by R but it turns out to be wrong.. Should something be considered if it's disk? (Because i have seen only the cases of rod getting torques) What's wrong in my thought? Please help me out here.