Question

A 1.30 kg mass is suspended from a spring, with a spring constant of 135.0 N/m. Find the driving frequency which would cause resonance.

Answer 1

Do a Google search for " natural frequency of spring mass system"

You should know it by heart.

Answer 2

I know that w=squ(k/m)
and T=(2*pai)/w

but its wrong and I don't know what to do.. can you help me?