I put in the By of 2.42 and we can now

use the equations of equilibrium to solve for our first two members

FCB and FEB. So let's sum forces in the y direction.

I'm doing a lot of this together with you

but I'm pretty soon here, I'm going to let you take

off and do it on your own, since it just

gets to be the same procedure over and over again.

So we've got the 4, 5ths

component, of FCB plus 2.42 for

the BY equals 0. And so I get FCB

equaling minus 3.025.

Which, that means that instead of tension, I assume them

all the members in tension, but instead of tension, this member is in compression.

So FCB is equal to 3.025 inn compression,

and I'll just put the symbol c in

parenthesis there for compression. So that's

one of my forces in one of my members. Keep on going,

let's do some of the forces in the x direction, set it equal to zero.