Does &quot;Weight Shift&quot; = Momentum

Posted by: Jack Mankin (MrBatspeed@aol.com) on Fri Dec 14 20:48:10 2007

Hi All

I will soon start a thread to discuss whether or not a batterï¿½s linear momentum developed during his stride is a factor in generating hip and shoulder rotation. For this discussion, we need to clarify the difference between the term "weight shift" and "momentum."

I think we can all agree that since the batter's axis is tilted rearward, he has more weight on the back-foot as he initiates his swing. We can further agree that during the swing, the batter's weight on his back-foot becomes increasingly lighter so that by contact almost all of his weight is supported by the front-leg. -- Therefore, many would say that during the swing, there is a "back-to-front," or forward weight shift.

However, was there actually a forward shifting of weight (linear mass movement) that would develop momentum (mass x velocity) to do work. As an example, what about a batter who does not take a forward stride but just initiates rotation about a stationary axis. He would also start with most of his weight on his back-foot and finish with his weight on his front-foot. But, since his body (or center of mass) attained no linear velocity, there would be no momentum to do work being generated.

I know this is probably "information overload" to many of you. I do feel however that it is necessary to make this destination between the term "forward weight shift" and the actual generation of momentum for our coming discussion.

Jack Mankin

Followups:
 Re: Does “Weight Shift” = Momentum Jimmy [ Sat Dec 15 03:49:25 2007 ] Re: Re: Does "Weight Shift" = Momentum Jack Mankin [ Sat Dec 15 23:38:24 2007 ] Re: Re: Re: Does “Weight Shift” = Momentum Jimmy [ Mon Dec 17 03:15:00 2007 ] Re: Re: Re: Re: Does “Weight Shift” = Momentum Graylon [ Mon Dec 17 07:25:30 2007 ] Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Jimmy [ Mon Dec 17 10:05:42 2007 ] Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Jack Mankin [ Mon Dec 17 11:01:57 2007 ] Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Jimmy [ Mon Dec 17 13:18:40 2007 ] Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Graylon [ Mon Dec 17 13:17:32 2007 ] Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Graylon [ Mon Dec 17 10:31:25 2007 ] Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Jack Mankin [ Fri Dec 21 15:32:40 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Graylon [ Fri Dec 21 23:31:32 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Re: Does ÃƒÂ¯Ã‚Â¿Ã‚Â½Weight ShiftÃƒÂ¯&At Jack Mankin [ Sat Dec 22 13:48:52 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Graylon [ Sat Dec 22 16:46:37 2007 ] Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum tom.guerry [ Thu Dec 20 08:35:44 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Jack Mankin [ Fri Dec 21 14:28:27 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Graylon [ Fri Dec 21 23:55:24 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Jack Mankin [ Sat Dec 22 14:46:28 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Graylon [ Sat Dec 22 17:00:40 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum Jack Mankin [ Sat Dec 22 21:18:22 2007 ] Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Does “Weight Shift” = Momentum tom.guerry [ Sun Dec 23 11:46:31 2007 ] Re: Does “Weight Shift” = Momentum Kate [ Fri Dec 14 21:10:23 2007 ] Re: Re: Does “Weight Shift” = Momentum Graylon [ Fri Dec 14 21:41:39 2007 ]

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