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Question: Answered & Verified by Expert
A rectangular block of mas $M$ and cross-sectional area $A$ floats on a liquid of density $\rho$. It is given a small vertical displacement from equilibrium; it starts oscillating with frequency $n$ then
PhysicsOscillationsMHT CETMHT CET 2022 (06 Aug Shift 2)
Options:
  • A $n \propto \sqrt{A}$
  • B $n \propto A^3$
  • C $n \propto A$
  • D $n \propto A^2$
Solution:
2240 Upvotes Verified Answer
The correct answer is: $n \propto \sqrt{A}$
$\begin{aligned} & F_{\text {restroing }}=(-\rho(A x) g)=m a \\ & \Rightarrow a-\left(g \frac{\rho A}{m}\right) x \\ & \Rightarrow \omega=\sqrt{\frac{\rho A g}{m}}=2 \pi n \\ & \Rightarrow n \propto \sqrt{A}\end{aligned}$

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