A cantilever beam of negligible mass is having a point mass m at its free end. The mass m is also supported by an elastic support of stiffness k1. If k2 is the bending stiffness of the cantilever, then the natural frequency of the mass m would be:
1
\(\sqrt {\frac{{{k_1}{k_2}}}{{m\left( {{k_1} + {k_2}} \right)}}} \)
2
\(\sqrt {\frac{{{k_1} + {k_2}}}{m}} \)
3
\(\sqrt {\frac{{{k_1} - {k_2}}}{m}} \)
4
\( {\sqrt {\frac{{{k_1}}}{m}} + \sqrt {\frac{{{k_2}}}{m}} }\)