Hello everyone! To start things off, I apologize if this thread does not go here. Today I had a test on Energy (Potential, Kinetic, Elastic) and we had a question which asked us to find out the value of k for a spring. The question was centered around a box hanging from a ceiling via a spring. Some velocity and other things were involved but I believe they will be irrelevant to what I want to know. What I wish to know is, when an object is suspended above the ground, and it’s attached to the ceiling via a spring, why is it that you can use Ep=m*g*h to aid in solving the problem? The reason why this confuses me so much is that the height that is used to solve the question is given from x? But isn’t x the distance to the ceiling, not the distance to the ground? So why would this work? And since it does, why are you using the acceleration to gravity? Relevant equations Ee=Ek+Ep (k*x2)/2=(m*v2)/2+m*g*h x=h <----- this is where I am confused.