# Tension in a system

1. Sep 21, 2015

### goldfish9776

1. The problem statement, all variables and given/known data
I was asked to find the tension in CD in this question . The ans given is 4.22kN.
my working is arc tan (surd 13)/12, tetha = 16.7 degree
CD cos (16.7) = 20kN
CD= 21kN.
p/s: i have used pythagora's theorem to fe the surd 13
2. Relevant equations

3. The attempt at a solution

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2. Sep 22, 2015

### paisiello2

I don't think there can be tension in member CD.

3. Sep 22, 2015

### haruspex

The diagram is very unclear. I'm not sure what the various distances refer to, or where the A and B points are in space. Is there a verbal description that goes with it?

4. Sep 23, 2015

### goldfish9776

actually i'm asked to find tension in CD, AD , and BD. I've found Cd only . I have no idea at all for AD and BD

5. Sep 23, 2015

### goldfish9776

the book stated ' determine the load in each member of the frame shown in Figure .'

6. Sep 24, 2015

### haruspex

Well, I cannot interpret the diagram. If it is clear to you, please explain your interpretation ( provide co-ordinates for each of the points).