A particle of mass $5 × 10^{-5}\ kg$ is placed at lowest point of smooth parabola $x^2 = 40y$ ( $x$ and $y$ in $m$ ). If it is displaced slightly such that it is constrained to move along parabola, angular frequency of oscillation (in $rad/s$) will be approximately:-
  • A$\sqrt 2 $
  • B$10$
  • C$\frac{1}{{\sqrt 2 }}$
  • D$5$
Diffcult
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