# Homework Help: 3D Equilibrium

1. Nov 2, 2008

### Oblivion77

3D Equilibrium(and Moments)

1. The problem statement, all variables and given/known data

2. Relevant equations

Sum of the forces in x=0
Sum of the forces in y=0
Sum of the forces in z=0
Sum of Moments (at a point) =0 (of x,y,z)

3. The attempt at a solution

Since it is a fixed end there is 6 unknowns right at the origin (Ax, Ay, Az, Max, May, Maz). It also states that the the force is parallel to the XY plane so I take it there is no k component of the force. The only problem I am having is with the force it says "its magnitude will not exceed 970N". I tried breaking up the 970N into i and j components using the coordinates given and calculating the moment about the origin using cross product, but I got the wrong answer. I know how to solve the problem, but the force is throwing me off.

Any hints would be nice, thanks!

Last edited: Nov 2, 2008
2. Nov 2, 2008

### Oblivion77

Anyone have any ideas? Sorry for the rush, but this question is killing me.