**Shear Flow**

If the shearing stress f_{v} is multiplied by the width b, we obtain a quantity q, known as the shear flow, which represents the longitudinal force per unit length transmitted across a section at a level y_{1} from the neutral axis.

**Application of Flexural and Shearing Stresses to Rectangular Section**

For rectangular section, and

The bending stress at a level from the neutral axis is

and the maximum bending stress in the section is

The maximum shearing stress in the section is

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