1. The problem statement, all variables and given/known data I'm sorry to bother anyone but this question is really driving me insane. It's one of my question on my notes and I've been trying to re-solve it. It's in oscillatory unit and apparently we have to know what the speed is. A 4.00kg mass is an horizontal frictionless surface attached to a spring with k=20.0N/m. The mass is pulled 0.300m from a equilibrium, then let go. 2. Relevant equations max speed 3. The attempt at a solution The answer is suppose to be 0.671m/s but I keep getting 0.612m/s... ..Never mind I figured it out.