# Find the largest shear stress

#### alexteplyaxins

Problem Statement
Determine the largest internal shear force resisted by the bolt.
Relevant Equations
Apply equibrilium state.

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#### osilmag

Gold Member
What are the sums of the forces for each case?

#### alexteplyaxins

What are the sums of the forces for each case?
I just can solve problem $a$ by apply equilibrium of force and momentum to find $F_a$ and $F_b$. But with case b, I can't find third equation.

Boom, boom !!!!

#### haruspex

Homework Helper
Gold Member
2018 Award
I just can solve problem $a$ by apply equilibrium of force and momentum to find $F_a$ and $F_b$. But with case b, I can't find third equation.
Yes, b) is not fully specified. E.g. you could take away all of the shown forces and still have shear on the bolt resulting from tensions and compressions in the members on the left.
You could set one of those on the left as an unknown and find the shears in terms of that, then find the value of the unknown which minimises the maximum shear.

"Find the largest shear stress"

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