Correct Answer - Option 2 : It is the product of the shear stress at any level and the corresponding width b (of the section)
Concept:
Shear force per unit length is called shear flow. Shear flow creates shear stresses.
When a transverse shear force is applied to a structure, such as a beam, the result is variation in bending normal stresses along the length of the beam. This variation induces an internal horizontal shear stress within the beam that varies with position from the neutral axis in the beam. This induced internal horizontal shear stress can be calculated both in magnitude and direction by using the concept of shear flow.
Mathematically, Shear flow (q) is the product of the shear stress (τ) at any level and the corresponding width b. It is given by:
∴ \({\rm{q}} = {\rm{\tau }} \times {\rm{b}}\)
