Find the damping ratio for the system given below, if the block is pulled down by 15 cm and released from rest.
m = 2 kg, c = 0.5 N/(m/s), k1 = 0.5 N/m, k2 = 0.25 N/m
1
\(\frac{{\sqrt 3 }}{2}\)
2
\(\frac{{\sqrt 3 }}{4}\)
3
\(\frac{1}{{2\sqrt 3 }}\)
4
\(\frac{2}{{\sqrt 3 }}\)