2-E IMPACT PHYSICS - Conservation of Momentum

Chapter 2

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Old 04-27-2006, 11:51 AM
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Lag pressure past follow-through? GM#251
Quote:

Originally posted by Ringer
That may be the impression you get Yoda, but in fact it's rotational. The shoulders rotate to generate the uppercut. This same rotation occurs in the golf swing on an angled plane. This makes both motions similar but with slightly varying extensions and alignments of the arm. The behavior of the upper body is however similar. 2-H and 7-13 shows us that the shoulders have "crucial On Plane Functions".



My problem with this uppercut image is not that Clubhead Force and Motion is Rotational and On Plane. This is exactly correct per 1-L #9 and #11. My problem is that an uppercut punch -- no matter how explained -- still involves an Upward Thrust. And this is not how the Golf Stroke works.

What actually happens is that the Club is Driven through Impact by an On Plane Force moving toward the Plane Line (1-L #10). That On Plane Force is the Right Forearm (itself Driven by either Muscular Thrust or Centrifugal Force). And that Right Forearm Drives Down Plane directly at the Plane Line until the Bent Right Arm has become Straight. This Full Extension does not occur until the end of the Follow-Through (6-A-4), and this is after the Clubhead has passed Low Point and is already on its way back Up and In. Therefore, it is crucial that the Player continue to direct his On Plane Thrust strongly Downward (and also Outward) directly at the Plane Line -- which is on the Ground and not "up" in the air somewhere -- even though the Ball has long gone and the Club has already begun its Upward journey toward the Finish (1-L #15).

At the end of the Follow-Through, both Arms are Straight, the Left Wrist has Rolled (or, far less desirably, Bent) and the Flail (the Left Arm and Club) has entered its Deceleration Phase (2-K #3). Thus, only Momentum is available to carry the Club to the Finish.

Again, at no time is there an Upward Thrust. There is only a Downward and Outward Thrust. I promise you that 100 percent of the golfers who are told to employ an "Uppercut Punch" will misinterpret the advice. In other words, they will not Drive the Right Forearm Down and Out directly toward the Plane Line (on the Ground) until the Right Elbow has fully-Straightened and the Right Arm Thrust has been exhausted.

And if they don't do that, they're toast.
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Old 04-27-2006, 11:58 AM
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Lag pressure past follow-through? GM#256
Originally Posted by DelawareGolf
Yoda,


During this sentence of your explanation

Quote:

Again, at no time is there an Upward Thrust.

I think it would have been appropriate to add "during the release interval". Just a suggestion!!!

DG

My discussion of the proper Direction of Thrust was not limited to the Release Interval. It included all Stroke Sections from The Top to The Finish (8-6 through 8-12).
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