The cantilever beam of Length $L$ and Flexural modulus $EI$ is subjected to a point load $P$ at the free end. The elastic strain energy stored in the beam due to bending (neglecting transverse shear) is
- $\dfrac{P^{2}L^{3}}{6EI} \\$
- $\dfrac{P^{2}L^{3}}{3EI} \\$
- $\dfrac{PL^{3}}{3EI} \\$
- $\dfrac{PL^{3}}{6EI}$