A Spring with a Force Constant of 1

Multiple Choice

A spring with a force constant of 1.50 N/m is attached to a mass of 120 g. The system has a damping constant of 0.0180 Ns/m. How long does it take the amplitude of the oscillations to decrease from 10.0 mm to 5.00 mm?

A) 12.5 s
B) 10.0 s
C) 6.25 s
D) 4.62 s
E) 9.24 s