A) 1.40 Ns/m
B) 52.22 Ns/m
C) 52.92 Ns/m
D) 529.20 Ns/m
Correct Answer: C
Solution :
\[{{\omega }_{n}}=\sqrt{\frac{k}{m}}=\sqrt{\frac{0.7\times {{10}^{3}}}{1}}=26.46\,\,\text{rad/s}\] \[{{c}_{c}}=2m\] \[{{\omega }_{n}}=2\times 1\times 26.46=52.92\,\,\text{Ns/m}\]
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