# Homework Help: Pin jointed frame question

1. Jul 14, 2011

### warrio1010

The problem statement, all variables and given/known data
[PLAIN]http://img847.imageshack.us/img847/1704/pinjointed.png [Broken]
Calculate the reactions at A and E and the forces in all members.

The attempt at a solution

At a loss regarding the reactions, tried equating vertical and horizontal.
As for the members I guess its just a case of working from the reaction values and using sin and cos but also can't get my head around this.

Any methods/pushes in the right direction much appreciated.

Last edited by a moderator: May 5, 2017
2. Jul 14, 2011

### pongo38

In 2-dimensional work, as this one is, how many equations are there of static equilibrium? And what are they?

3. Jul 14, 2011

### warrio1010

sum of v=0 and sum of horiz=0
?

4. Jul 14, 2011

### SteamKing

Staff Emeritus
Don't forget the sum of the moments = 0.

5. Jul 16, 2011

### warrio1010

I have VA as 10 but cant work out the other two, the equation would suggest that HE-HA+5=0 which leaves two unknowns so i'm stuck with that.

6. Jul 19, 2011

### PhanthomJay

You are forgetting about the 3rd equation of equilibrium alluded to in the prior responses.