- #1
slain4ever
- 63
- 0
Homework Statement
Hi so I have the following truss:
http://screencast.com/t/BIdagRt5abg
and I need to calculate the forces in every member by method of joints
The Attempt at a Solution
So I got the Reaction forces:
F(BG) = 25N and F(AC) = 35N
Now I'm not exactually sure what to do next, I know you calculate the x and y forces at each joint, I started at C
and then I got F(y) = 0 =35N + F(CJ) sin(45)
F(CJ) = -49.497
Im fairly sure that that is right
but when I get to the horizontal my equation is like this 0=F(CJ) * Cos(45)
which doesn't seem right since it means F(CJ) is zero
can someone please help me along thx.