A particle of mass m is suspended from a ceiling through a string of length L. The particle moves in a horizontal circle of radius r such that r = \(\frac{{\rm{L}}}{{\sqrt 2 }}\). The speed of particle will be:
1
\(\sqrt {{\rm{rg}}}\)
2
\(\sqrt {\frac{{{\rm{rg}}}}{2}}\)
3
\(\sqrt {{\rm{2rg}}}\)
4
\(2\sqrt {{\rm{rg}}}\)
5
None of the above/More than one of the above.