Will there be a reaction at the hinge B in this question?

[Asad Raza]

I have solved this question by completely disregarding the reaction at the hinge B. And surprisingly, answer turns out to be correct. Why is that so?

 

[BvU]

Half the weight of AB is on B (AB doesn't rotate or move) and that gives you the $13\over2$.

For the second part I'm too lazy to work it out (you did that already); if you post your work, I (or someone else) may comment (e.g: "it doesn't matter" or "it's a numerical coincidence")

 

[Asad Raza]

How do we know that half of AB's weight is on B?

 

[zwierz]

You have 6 scalar unknowns: two components of each reaction force at the points A,B,C. You also have three equations of statics for each rod. I wish you good luck

 

[Asad Raza]

You have 6 scalar unknowns: two components of each reaction force at the points A,B,C. You also have three equations of statics for each rod. I wish you good luck

But Reaction at B isn't playing a role. Just explain it to me that whether is that a coincidence or there's some solid logic behind?

 

[zwierz]

How can I explain if you already know what plays role here and what does not? :)

 

[DrClaude]

This should be posted in a homework forum, with an attempt at a solution.

Thread closed.