1. The problem statement, all variables and given/known data If the initial period is 3.0 s and the mass is reduced to 1/3 of its initial value, what is the new period? 2. Relevant equations Possibly T=2pi*squareroot(m/k) 3. The attempt at a solution The solution is something close to 1.73. I have no idea what equation to use, even. Any assistance would be appreciated.