1. The problem statement, all variables and given/known data A mass m=.25 kg is suspended from an ideal Hooke's law spring which has a spring constant k=10 N/m. If the mass moves up and down in the earth's gravitational field near earth's surface find period of oscillation. 2. Relevant equations T=1/f period equals one over frequency T= 2pi/w two pi/angular velocity f=w/2pi w= (k/m)^1/2 T=2pi/sqrt(k/m) 3. The attempt at a solution Using these equations I found periods for springs that were horizontally gliding, my question is can I use these same formulas for a vertical spring? Does gravity have to be taken into account?