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http://amd.streamload.com/jubaitca/Hosted/pictur28.JPG [Broken]

I have tried doing this problem, but i am not getting the right answer. This is what i did:

y(unknown)=40cos60 = 7 mm

x (unknown) = 40 cos 30 - 20 == 14.641mm

Then

Pcompression = 2(75x7x(34.641/2)) + 2(((20x75)/2)(14.641)

= 40149 N

But the answer is somehow... 73.92 KN

Is there anything wrong with my calculations?

Thanks

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# Homework Help: Stress Problem

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