1. The problem statement, all variables and given/known data In general, I know that you can use the equation ωn=[k/m]^0.5 to calculate the natural frequency of a hanging spring and mass system. However, for a non-ideal spring (where the mass of the spring isn't negligible) a correction factor is added to the equation and it becomes: ωn=[k/(m+ms/3)]^0.5 where k is the spring constant, m is the mass of the hanging mass, and ms is the mass of the spring. How would you derive the ms/3 correction factor in this equation? I'm trying to prove that the equation is viable. Thanks!