 #1
 9
 1
Homework Statement
I'm having a hard time finding the support reactions [tex] R_{fx} ; R_{fy} ; R_{kx} ; R_{ky} [/tex] in this truss.
2. The attempt at a solution
I got four equations using the equilibrium conditions (sum of forces along x and y ; sum of moments on F and on C) but the system doesn't seem to have a solution. Am i missing something?
[tex]
(\Sigma x = 0) R_{fx} + R_{ky} = 0 \\
(\Sigma y = 0) R_{fy} + R_{ky} = 530 \\
(\Sigma M_{f} = 0) 8R_{kx} + 40R_{ky} = 11100 \\
(\Sigma M_{c} = 0) 20R_{fx} + 20R_{fy} 12 R_{kx}  20R_{ky} = 500
[/tex]
Thanks!
Attachments

51 KB Views: 211