# Statics Homework help - find tension

by brvfan20
Tags: equilibrium, forces, reactions, statics, tension
 P: 7 [b]1. In Figure P4.111 determine the tensions in cables BC and BE. Neglect the weights of all members and assume that the support at A is a ball-and-socket joint. The 5200-N force has no x component. (picture is attached below) [b]2. $$\Sigma$$ Fx = 0 $$\Sigma$$ Fy = 0 $$\Sigma$$ Fz = 0 $$\Sigma$$ MD = 0 3. The attempt at a solution Okay so I figured out the angles of the cables and did the sum of the forces. I had trouble figuring out the sum of the moments. Here is what I have so far: $$\Sigma$$ Fx = 0 --> Ax + T1*cos(26.6) = 0 $$\Sigma$$ Fy = 0 --> Ay + T1*sin(26.6) + T2*cos(18.4) + 5200*cos(22.6)= 0 $$\Sigma$$ Fz = 0 --> Az + T2*sin(18.4) + 5200*sin(22.6) = 0 T1 is the cable from B to E T2 is the cable from B to C Anything you guys can do to help would be much appreciated, thanks! Attached Thumbnails
 P: 7 Statics Homework help - find tension Hey so I figured out the majority of the problem. Im just having trouble breaking the three forces into their components. (mostly with the angle) Can someone please tell me if this is correct. T1 = BE = T1cos(26.6)$$\hat{i}$$ + T2sin(26.6)$$\hat{j}$$ T2 = BC = T2cos(18.4)$$\hat{j}$$ + T2sin(18.4)$$\hat{k}$$ F = 5200cos(22.6)$$\hat{j}$$ + 5200sin(22.6)$$\hat{k}$$ pleeeease help. thanks!