1. The problem statement, all variables and given/known data 2. Relevant equations ∑Fx=0 ∑Fy=0 ∑M=0 3. The attempt at a solution I am just concerned with part a. I got the correct answers doing this: First, FBD of segment AB: +cw ∑M_A=0: -136 - 6*By = 0 By = -22.7N two ways to get Ay: one: +cw ∑M_B=0: -136 + 6*Ay = 0 Ay = 22.7N two: ∑Fy=0: -22.7 + Ay = 0 Ay = 22.7N FDB entire beam: ∑Fy=0: 22.7 - 22.7 + Cy = 0 Cy = 0 ∑Fx=0: -440 + 220 + Cx = 0 Cx = 220N Ok, so I got the correct answers. However, here is where I get confused. If I make a FBD on segment BC I get a different answer for Cy. My attempt at a FBD: this leads to either: ∑Fy=0: -22.7 + Cy = 0 Cy = 22.7N or +cw ∑M_B=0: -136 + 3*Cy = 0 Cy = 45.3N Clearly my FBD is wrong for segment BC. I assume the correct FBD would have a zero reaction at point B; this would give the correct answer (0) for Cy. In order for Cy to be zero, there must be no forces or moment at point B in the FBD, but this doesn't make sense to me.