Homework Statement
FIND A FORCE OF A 3-D TRUSS
Homework Equations
ƩFX=0
ƩFY=0
ƩFZ=0
The Attempt at a Solution
I figured out rB(2i,-1j,0), rc(2i,1j,0),rd(1i,0,2k) can you check if my vectors r right. After find the vectors of point B,C,D I calculated the unit vector, not I am...