1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution Well since spring is in SHM, only conservative forces are at play here. So using conservation of energy, the kinetic energy would be the change in potential energy. Which I have set up as KE = 1/2k(A^2)2 - 1/2k(A/4)2 after some algebra, combining like terms with common denominators I am left with, KE = (15/32)kA2 now when I take the fraction of the two, PE/KE of (15/32)kA2 / 1/2mv2 I get (15/16)kA2/mvf2 So I'm thinking my answer would be 15/16 I don't know whether to just ignore the variables since there was no value in them or I find a way to relate them since I was given a frequency?