A 0.40kg mass is attached to a horizontal spring. Measurements show that the restoring force on the mass is F=−(12N/m)x, where x is the displacement from equilibrium. Assuming negligible friction, determine the angular frequency of the resulting oscillation.
a) 30rad/s
b) 2.2rad/s
c) 5.5rad/s
d) 3.5rad/s