Basic equation of deflection (y) of the beam is represented by \(EI\frac{{{d^2}y}}{{d{x^2}}} = M\), where EI → flexural rigidity and M → Bending moment, then \(EI\frac{{{d^3}y}}{{d{x^3}}}\) will be:
1
Rate of loading
2
Shear force at the section
3
Bending moment at section
4
Zero always