Rectangular block floating on a liquid, pushed down: frequency of its oscillation

1. A.
   $\frac{1}{2\pi}\sqrt{\frac{A\rho g}{m}}$
2. B.
   $2\pi\sqrt{\frac{A\rho g}{m}}$
3. C.
   $\frac{1}{2\pi}\sqrt{\frac{m}{a\rho g}}$
4. D.
   $2\pi\sqrt{\frac{m}{a\rho g}}$

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1. A.
   $2\pi\sqrt{\dfrac{m}{A\varrho g}}$
2. B.
   $2\pi\sqrt{\dfrac{A\varrho g}{m}}$
3. C.
   $\dfrac{1}{2\pi}\sqrt{\dfrac{A\varrho g}{m}}$
4. D.
   $\dfrac{1}{2\pi}\sqrt{\dfrac{m}{A\varrho g}}$

Tap an option to check your answer.