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rc flyer uk
Nov16-05, 09:31 AM
P: 11
I started my aerospace enginnering degree this year but have missed the first 7 weeks of lectures due to being in hospital, i was sent all lecture notes but am strugling with my mech module. I have my first assignment questions due in this week and am having dificulty thought you guys might be able to give me some guidance! Thanks


Two cables AC and BC are tied together and loaded at C as shown. The maximum allowable tension in each cable is 800N.

Find the magnitude of the largest force P Which could be applied at C.

Also find the corresponding value of the angle α

I have attached a word document of the diagram!

My workings so far have been something like this:

I have drawn a free body diagram to help make things more simple!

I have resolved the forces and renamed bc to T1 and ac T2

Apply the equilibrium conditions-

ΣFx=0= T1cos50- T2cos35 (+Pα) unsure if (+Pcosα) is nessacery as i have never completed an angular question like this!

ΣFy=0= T1sin50 + T2sin35 - Psinα

Next i am gusing as i am teaching myself from a book! i use these to equations as simultaneous equations and solve them. I was wondering if i should use the value of 800N for T1 and T2 as this is there max allowable tension but i am not sure!

Please can some one point me in the right direction, thanks alot your help is much apreciated.

Attached Files
File Type: doc Diagram 1.doc (23.5 KB, 22 views)
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