An issue with these two curved beam homework problems

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SUMMARY

The discussion centers on two homework problems involving curved beams, specifically the calculation of stress at points A and B. In the first problem, the calculated effort at point A is close to the teacher's result, while the effort at point B significantly differs. The second problem shows closer results to the teacher's, but discrepancies remain. The main issues identified include the omission of load in the first problem and a specified load of 5 kN in the second problem, which are critical for accurate calculations.

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Homework Statement
Curved beams
Relevant Equations
P/A-M(R-rA)/ArAe
Hi, good evening/morning/night!

I have a problem with this 2 homework problems about curved beams.

In both I must calculate the stress at points A and B.

My procedure is correct, but for some reason in:

First problem - the effort in A is very close to that of the teacher, but the effort in B is very different.

C3.png


Second problem - In both efforts I am close to the teacher's results, but they are quite different.

R.png

I don't think I'm too far away, but I must be doing something wrong somewhere and I can't figure out where.

I would greatly appreciate your help.
 

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The pictures of your calculations are barely visible.
Could you please recreate the text of both problems?
I can’t see any load on the second one.
Sorry
 
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Lnewqban said:
The pictures of your calculations are barely visible.
Could you please recreate the text of both problems?
I can’t see any load on the second one.
Sorry
I am very sorry, they have already been corrected in the main text.

In the first problem it does not have a load, so the "P/A" is omitted from the formula.
In the second it is 5KN the load
 

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