Hooke's Law and Finding the Constant "k" 1. The problem statement, all variables and given/known data What is the relationship between the extension in an elastic spring and the mass of an object suspended from it? 2. Relevant equations F = mg F = -kx mg = -kx 3. The attempt at a solution Here is my lab data: Now, in order to find the relationship, our teacher said we need to derive a relationship. But I don't know what to do. I am thinking that somehow I need to find the constant of the spring in order to find the relationship. The teacher also asked to use the equation to determine the extension when the mass is increased, for example, when the mass is 650 g. Also, here is my try to find the constant. mg = -kx (0.1)(-9.8) = -k (0.026) -0.98 / 0.026 = -k k = 37.69 I am not sure what to do. Can anyone please help me? Thanks.