1. The problem statement, all variables and given/known data The two-member frame (see picture attached) supports the 200-lb cylinder and 500 lb–ft couple moment. Determine the force of the roller at B on member AC and the horizontal and vertical components of force which the pin at C exerts on member CB and the pin at A exerts on member AC. The roller C does not contact member CB. 2. Relevant equations 3. The attempt at a solution I split the frame into members AC and CB. The I found the forces acting on D(pulley) which gave me Dx = 200 lb and Dy = 200 lb. I plugged this into member CB; giving me the next equations: ƩFx = 0: Cx +Bx -200 = 0 ∴ Cx + Bx = 200 ƩFy = 0: Cy - 200 = 0 ∴ Cy = 200 ƩMc = 0: 200(4) - 4Bx = 0 ∴ Bx = 200 which also give me Cx = 0 from the summation of Forces in the x direction. Then I plug the relevant values of Cx, Cy and Bx into the AC member; this gives me the following equations: ƩFx = 0: Ax - Bx + 200(from cable) = 0 ∴ Ax = 0 ƩFy = 0: Ay - 200 = 0 ∴ Ay = 200 The issue that im having is that this last answer is wrong according to the book. Its supposed to be Ay = 175 lbs. I know I didn't use the couple moment at all so, maybe this is the reason? But I really don't see how it could be 175 lbs. Any help would be greatly appreciated.