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Which of the following is the best description of the concept of beam shear?

1. An internal twist in a beam that balances the external load
2. An external force of a support in internal force
3. Transverse to the beam that balances the external load
4. A load applied to a beam

Answer :

3. Transverse to the beam that balances the external load is the best description of the concept of beam shear.

Beam shear refers to the internal forces acting along a section of a beam as a response to external loads applied perpendicular to its longitudinal axis. These forces result in a shearing stress that causes one layer of the beam to slide over an adjacent layer.

This concept is crucial for understanding how beams handle transverse forces in various engineering applications. In the example of shear deformation, illustrated in related figures, two antiparallel forces applied tangentially lead to a gradual shift in the direction tangent to these forces.

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