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13.Oscillations
hard
આકૃતિમાં દર્શાવેલ $M$ દળના એક પદાર્થની સરળ આવર્ત ગતિનો આવર્તકાળ $\pi \sqrt{\frac{\alpha \mathrm{M}}{5 \mathrm{~K}}}$ છે જયાં $\alpha=\ldots \ldots .$.

A
$12$
B
$15$
C
$30$
D
$35$
(JEE MAIN-2024)
Solution
$\mathrm{k}_{\mathrm{eq}}=\frac{2 \mathrm{k} \cdot \mathrm{k}}{3 \mathrm{k}}+\mathrm{k}=\frac{5 \mathrm{k}}{3}$
Angular frequency of oscillation $(\omega)=\sqrt{\frac{\mathrm{k}_{\mathrm{eq}}}{\mathrm{m}}}$
$(\omega)=\sqrt{\frac{5 \mathrm{k}}{3 \mathrm{~m}}}$
Period of oscillation $(\tau)=\frac{2 \pi}{\omega}=2 \pi \sqrt{\frac{3 \mathrm{~m}}{5 \mathrm{k}}}$
$=\pi \sqrt{\frac{12 \mathrm{~m}}{5 \mathrm{k}}}$
Standard 11
Physics
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