Determine the tension in cable BC and the reactions at A.

[Liondancer]

Homework Statement

The 400N weight of member AB acts at its midpoint. The length of member AB is 3m. Determine the tension in cable BC and the reactions at A.

Homework Equations

m=rxf? maybe
simple force equations

The Attempt at a Solution

Not sure whether to use sum of all forces to equal 0 or to add the concept of moment into this problem.

 

[Liondancer]

Also for the reactions at A, according to my textbook, it looks like a triangle with a pin on it so I am assuming reactions at A would only have a vertical force (pointing up; normal) and also and force coming from the left, pushing right at point A.