power output

This video seems like it is getting popular, but maybe that is because it is so awesome. Maybe it is just me, but I find this video very visually satisfying. I love the way they compare the different runners. Anyway, there is some physics here. Commenter Ben sent me the link to this video (thanks!) with some great questions. Which of the runners has a greater kinetic energy? What about the power? These aren't too difficult to answer, but the first thing is to get the data. There are several options (including just using a stop watch). But no, that is not good enough for me. Instead, I…