1. The problem statement, all variables and given/known data I reference the problem posted here: https://www.physicsforums.com/threads/work-and-spring-problem.194531/ 2. Relevant equations Work = Force * Distance F = kx 3. The attempt at a solution Wouldn't the limits of integration in part 2 be from 5 to 9, since x is the compression distance, not the length of the spring? Thanks!