1. The problem statement, all variables and given/known data http://prntscr.com/7rtrep http://prntscr.com/7rts95 2. Relevant equations theta = TL/GJ t(max)= Tc/J 3. The attempt at a solution The two questions i have are rather similar so i put them up at the same time, i hope thats okay. For the first one ( the first link) i started by angle of twist = 0 , thus TbcLbc + TcdLcd + TdaLda = 0 (1) so then i have to find some way to relate those torques to the reactions at ends A and B. I assumed Tb to be positive (in tension) and worked my way up the shaft drawing free body diagrams. my results : (2) Tb = -Tbc Tcd = -Tb + 800 Tad = -Tb+300 then i plugged equations 2 into 1 and solved for Tb. my result was 645N-m which doesnt make sense to me since the net torque experienced by the member should be 300N-m. I may have some conceptual information messed up in my head, any insight would be wonderful! for the second link, id only like to know if im thinking about it correctly. I can find the reactions at the fixed supports, and create equations that relate them to the torques along different segments of the bar. Would i then do this tmax=Tac(c)/J ? thank you in advance for any insight!