The directions of normal and shear stress

[yecko]

Homework Statement

Homework Equations

direction of normal and shear stress

The Attempt at a Solution

I view it like A and C are the same; B and D are the same...
as both shear stress of A and C points outwards and shear stress point to the corner with 135 deg
vice versa for B and D

what should I notice from this problem and what theorem can I apply to it so that I can distinguish the correct answer?
thank you

 

[PhanthomJay]

Is there a choice "e" as stated in the problem, but which doesn't show on your image?

 

[yecko]

E is to draw the correct answer by yourself

 

[PhanthomJay]

E is to draw the correct answer by yourself

But the problem doesn't say that. Why do you say that?

 

[Orodruin]

what theorem can I apply to it so that I can distinguish the correct answer?

Newton’s second law.

 

[PhanthomJay]

E is to draw the correct answer by yourself

Oh I think I understand. Image (e) is just a blank that asks you to draw in the correct diagram. Well since (a), (b), (c), and (d) may be incorrect, it is best to get out your pencil and paper and start drawing up (e). Draw free body diagrams of either plane A or B, using Newton's laws, and utilize your knowledge of vectors and vector components acting normal and perpendicular to the inclined section.