1. The problem statement, all variables and given/known data See the this link for problem statement, http://i48.tinypic.com/vphsm1.jpg Case 1 I've solved, however I'm unsure about how good my solution is for case 2. 2. Relevant equations F=ma Fu = N * uk 3. The attempt at a solution Ok first I sum the forces in the y direction orientated about the log so my y direction is normal to the log. N - 400(9.81)cos(a) = 0 then i do a force summation in the x direction. 0.5*N -2T +400*9.81sin(a)=0 next I do a force summation on block A in the upward direction, where the downward direction is positive, 125(9.81)-T = 0 so T =1226.25 N Now this where i get stuck. I have two equations with two unknowns but can't solve for a. my attempt is as follows: N=400*9.81*cos(a) then i sub this into 0.5*N -2T + 200*9.81sin(a) to get 1962cos(a) -2452.5 + 3924sin(a) =0 but i cannot solve this equation for a. Any tips on where I'm going wrong would be greatly appreciated. Thanks!