This lesson covers the concept of forces within beam structures, focusing on shear forces and bending moments. It explains how to identify these forces within a small section of a beam and how they relate to each other. The lesson also discusses the use of equilibrium equations to connect these forces. It further elaborates on the variation of shear force and bending moment with respect to the load applied. The lesson concludes with the application of these concepts in determining the maximum bending moment in a beam structure.

- Shear forces and bending moments are key forces within a beam structure.
- Equilibrium equations can be used to connect these forces and understand their relationship.
- The variation of shear force and bending moment depends on the load applied on the beam.
- The maximum bending moment in a beam can be determined by identifying where zeros exist in the shear force.

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