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I cannot seam to calculate the magnitude and sense of the axial force on these members. The members I need to calculate are AC,AF,CD,CF,FD and FB. (see attachment, and note my paint skills are not...

Thank you very much for your help I have got the answer to that and many other resultant force questions now. :)

Ignore that last post of mine, I put in the wrong angle!

So far I have wrote down:

F1 15KN COS(45) = 10.6KN
F2 15KN COS(60) = 7.5
F3 20KN COS(0) = 20
= 38.1 KN
...

For F3, am I correct in saying it is 15KN* sin(45)=10.60KN

The notes that I was given for this question did not have a worked example which I was hoping for, and it doesn't mention how to work out...

Hi, thank you for your quick reply! Though, I am still confused :(.

How do I resolve each of the three into horizontal and vertical components?

I have not done maths/physics in 5 years so its...

I have to figure out the resultant force of this system, and I haven't a clue where to start :(. How do I start to solve this question, can someone please explain to me how to go about tackling...