Originally Posted by 5263
Although I don't think I can agree that the center of mass is moving in a straight line, I think I like that last statement....especially as you say "can be significant".
Maybe, maybe not. I think most consider the intial ground reaction force (by pushing up) to be verticle linear momentum. Anyway, as it pertains to this subject, linear momentum is used to create greater end point angular speed. It is not a case of either/or.