1. The problem statement, all variables and given/known data The elastic constant of a spring holding an object in equilibrium is 600 N/m. Find the extension of the spring with respect to its initial length if the object has a mass of 480 g. 2. Relevant equations hooke's law: F = -ky 3. The attempt at a solution I know that the answer is supposed to be 0.0125m, but I'm not sure as to how to arrive at this solution. I'm also a bit unclear as to how everything fits together (for instance, does initial length refer to the equilibrium position?), as I'm new to this concept. Could anyone please give a simple, straight-forward walk-through? Thanks!