What is bending moment (BM) & shear force (SF)?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Shear Force (SF): Internal force parallel to a beam's cross-section, causing sliding Bending Moment (BM): Internal moment causing a beam to bend
Relationships:
- SF = dM/dx (shear force is slope of moment diagram)
- BM causes stress: σ = My/I
- Maximum BM occurs where SF = 0
Critical for structural beam design and stress analysis.
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