1. The problem statement, all variables and given/known data It takes 2.11 J of work to stretch a Hooke's law spring 6.08 cm from its unstressed length. How much the extra work is required to stretch it an additional 6.93 cm? 2. Relevant equations F = -kx, W = Fd 3. The attempt at a solution I first solved for Force by dividing 2.11J by 0.0608 m, then I just took that value and multiplied by 0.0693. I am not sure if I'm doing the correct thing. Is there a need to solve for k? Thank you very much!