Three masses 700g, 500g and 400g are suspended at end of a spring a shown and are in&nbsp

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13.Oscillations

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Three masses $700g, 500g$ and $400g$ are suspended at the end of a spring a shown and are in equilibrium. When the $700g$ mass is removed, the system oscillates with a period of $3\,seconds$, when the $500g$ mass is also removed, it will oscillate with a period of .... $s$

A

$1$

B

$2$

C

$\sqrt 3$

D

$\sqrt{\frac{12}{5}}$

Solution

$\mathrm{T}=2 \pi \sqrt{\frac{\mathrm{m}}{\mathrm{R}}}$

$\frac{3=2 \pi \sqrt{\frac{0.9}{\mathrm{k}}}}{\mathrm{T}=2 \pi \sqrt{\frac{0.4}{\mathrm{k}}}}$

$\mathrm{T}=2 \mathrm{sec}$

Standard 11

Physics

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