Use the Figure to the Right to Answer the Next

Multiple Choice

Use the figure to the right to answer the next problem. A ball of mass m = 100 g and radius r = 10 cm is suspended from a light spring with spring constant k = 4 N / m.The ball is then immersed in oil with viscosity = 0.2 Pa.s , and set into oscillation with an initial amplitude of A = 2 cm.
-What is the angular frequency of oscillation?

A) 6.32 rad/s
B) 7.23 rad/s
C) 6.03 rad/s
D) 4.15 rad/s
E) 3.16 rad/s