How to Approach a Three-Dimensional Force System with a Corner Joint?

[mneox]

Homework Statement

http://img202.imageshack.us/img202/3496/71042279.jpg

Homework Equations

F = Fu

The Attempt at a Solution

Okay, so um I'm having trouble with this particular question. Normally if the wires were all straight, I'd have no problem solving this. But for this question, the wire seems to go from B to A to C, creating this corner/joint looking thing.

How do I solve with this thing? Kind of confused how I can utilize the angles as well... thanks the help in advance. I don't need answers or anything, but I just need a push to get started. The CAB corner joint thing is really throwing me off here. Not sure how to proceed.

Thanks again.

 

[tiny-tim]

hi mneox!

Okay, so um I'm having trouble with this particular question. Normally if the wires were all straight, I'd have no problem solving this. But for this question, the wire seems to go from B to A to C, creating this corner/joint looking thing.

the weight at A is in equlibrium, so that gives you an equation relating the tensions in AB and AC