Posted by: Boardy (fastpitchnut@comcast.net) on Sun Jan 20 12:28:44 2008

> The subject of this thread is to show that momentum is generated from the movement of mass but not from what from what we call “weight shift.” I wanted to make this distinction for our further discussion on momentum. I used this particular Bonds clip (no forward movement) to make that point.
>
> Jack Mankin

Jack, "Gaining Forward Velocity", "Shifting the COM", and "Weight Shift(Transfer)" are all the same thing. Weight is a measurement of Mass, and is being shifted in space. Why are attempting to make a distinction that doesn't exist?

Bonds and Pujols absolutely shifts their COM/Weight/Mass forward prior to swing initiation, and MORE IMPORTANTLY to your "thread subject", is still shifting COM/Weight/Mass forward during launch intitiation and prior to blocking. Notice in my clips, the rear/front shoulder and bathead begin rotation in the last frame of transfer shown in these clips.

http://i31.tinypic.com/t8nl2e.gif
http://i28.tinypic.com/2ekhcg1.gif

IMO, your analysis of this fact is flawed as indicated here of Bonds and Pujols shifting the COM and initiating his launch during the end of that shift.