Question: For the spring-mass system shown in the Fig.20(a), the frequency of vibration is (N). What will be the frequency when one more similar spring is

For the spring-mass system shown in the Fig.20(a), the frequency of vibration is $N$. What will be the frequency when one more similar spring is added in series, as shown in Fig.20(b)?

E (a) x Fig.20 m (b)

(a) $N / 2$

(b) $N / \sqrt{2}$

(c) $\sqrt{2} / \mathrm{N}$

(d) $2 \mathrm{~N}$.

E (a) x Fig.20 m (b)

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