A 20-kilogram mass is attached to a spring. If the frequency of simple harmonic motion is 2/pi cycles per second, what is the spring constantk? What is the frequency (in cycles per second) of simple harmonic motion if the original mass is replaced with an 80-kilogram mass?

would omega=sqrt[k/m]

frequency=2/pi so omega=4

what do I do next? or am I totally wrong!?