1. The problem statement, all variables and given/known data Please see attachment. 2. Relevant equations 3. The attempt at a solution Not really a homework problem. This is 1 of my exam question which I believe I had the right answer but my professor insists that he has the right one. I started by equating work done, W = integral F ds, with limit of integration from 0 to Lo. My professor's integral has limits from Lo to 2Lo. If I am correct, please tell me how I can explain it to my professor. If not, explain to me why. Thank you very much.