If I have a spring with a load and I oscillate it freely, applying hooke's law, TOP: GPE+EPE(Given by area under F-x graph) Equilibrium:KE (No EPE since x=0) Bottom:EPE Only Since energy is conserved, I have to assume that the extension (actually compression) at the top is less than extension at bottom as there is also GPE also at the top. Is this reasoning correct? But what about an oscillating spring being a example of simple harmonic motion? Isnt the amplitude from the equilibrium position supposed to be the same? Anyone help?