The period of oscillation for a mass-on-a-spring system is 0.14 s. If m = 3.9 kg, what is the spring constant of the spring? ____N/m

T = 2*pi/omega

where T is the period

0.14 = 2*pi/omega

Solve for omega

omega = (k/m)^0.5
where k is the spring constant; use algebra to solve for k