Thanks for your analysis - it seems to confirm my hunch. I was trying to do that myself. I know how to get v from F(t), but am unsure how to get v when I know F(r); I suspect a double integration. How did you do the analysis?
I am puzzled by the solution to a problem in electrical potential. The situation involves three identical point charges (same charge, same mass) each one placed at a corner of a square. The charges are released simultaneously and the problem is to find the maximum speed attained by each of them...