1. The problem statement, all variables and given/known data Determine the tension in cables BC and BD, and reactions at the ball-and- socket joint at A for the mast shown in the figure. Answers are given by the teacher for checking purposes: TC=707 N; TD=1500 N, Ax=0 N, AY=0 N, AZ=1500 N 2. Relevant equations ƩMx=0 ƩMy=0 ƩMz=0 ƩFx=0 ƩFy=0 ƩFz=0 3. The attempt at a solution Taking clockwise to be the positive moment direction about the x-axis. In other words, if you are standing at the positive side of the x-axis and look down towards the negative side, the moment will be spinning clockwise. ƩMx=0= -1kN(6m) + TBDcos(tan-1(3/6))cos(45)[kN]*(6m) ....this attempt at a solution is way wrong. The way I thought about it was, take the cos(tan-1(3/6)) to get your TBD in the yz-plane. Next, I took the cos(45) to get it going strictly in the y direction, and then multiplied by the perpendicular distance from the x-axis, 6 m. The problem I'm having is knowing what to do with the given force of 1 kN. There is no specified direction or any information stating where this force is going to. I know how to use the moment and force equations if I can get these things broken up into components correctly.