People are powered by their feet, generated by what is in contact with the surface. Planes are not powered by their wheels...Originally Posted by Killer
Here you are on the right track -- if someone were on a treadmill on rollerskates and someone was behind them could they not keep them from rolling off the back with just one finger? Speed up the treadmill do you think it is any more difficult to hold them in the same place?Originally Posted by Killer





