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## 10 thoughts on “HOMEWORK H31.B”

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How do I know the direction for the moment at A? Can we assume its in a particular direction and find reaction forces?

Yes, make an initial assumption and if you are right your answer will be positive and negative otherwise.

If you solve for the reactions at A, you can find the direction of the moment assuming a positive value means a counterclockwise moment. If you get a negative value in your calculations, you know it's in the clockwise direction.

I believe we need to assume the moment at A initially. If we assumed the moment to be anticlockwise at A, and if we got the moment as negative, we can just reverse it when we are graphing it and to further solve the question

Thank you Mason, Chirag.

Is it possible for the shear force diagram to never be 0?

Scratch that, accidentally made a mistake in calculating the reaction at A.

I believe you always need to go back to zero since it is in equilibrium. Not fully sure tho.

Assuming you only have wall on the left and P at the free end. Then if you plot shear force diagram it would constantly V(x)=P, but it's indeed equilibrium. So this reasoning might cause some problems.

You are right, you do always need to go back to zero on the graphs.