[Mike O]

Well, I made the mistake of promising a follow-up post to the Acceleration item in the Glossary- so I need to get the monkey off my back. Due to a number of reasons I'm going to keep it brief- maybe add items later if necessary (if questions arise).

Below is the item as listed in the Glossary.
ACCELERATION Example-Tobaggan ride.
Mechanical- A change in the product of Mass times Velocity
Golf- The Pressure Points increasing the Hand Speed or resisting Clubhead Deceleration.

I've said it before- I believe he had a knack for not communicating clearly, what he himself clearly understood. The following is my interpretation of what Homer is referring to in this Glossary item and I believe if I am correct- you'll see that my interpretation is something that you would not have understood by just reading the item for the first time or many times. Although, it's still messy and really would need to be completely re-done in one manner or another.

1) "ACCELERATION Example- Tobaggan ride."
As he says in the first paragraph of the Glossary ""Examples" selected are seldom total parallels but a parallel is there. So the Tobaggan ride example illustrates acceleration- which a Tobaggan ride has, but that's where the similarity ends, as the Tobaggan ride is a linear example and the Mechanical and Golf definitions relate to Angular Motion.

2) "Mechanical- A change in the product of Mass times Velocity."
In the golf swing we are dealing with Angular motion, Angular acceleration- see 6-C-2-B because if there was a cross reference to Glossary items this would be one of them. So in regards to changes in Mass, we're referring to an extension of the Primary Lever assembly- accumulator #2. In regards to Velocity we're referring to RPM's of the Primary Lever Assembly. So if you keep the radius of the primary lever assembly the same- and increase the RPM's then you have an increase in Angular Acceleration. And that's what you have happening during the Downstroke (Section Eight-Eight)

3) "Golf-The Pressure Points increasing the Hand Speed or resisting Clubhead Deceleration"
The Pressure Points increasing the Hand Speed happens in Section 8-8 The Downstroke before the release starts- that's the period of increasing RPM's- which in his equation is the Velocity. Regarding the comment "or resisting Clubhead Deceleration", that's referring to the law of Conservation of Angular Momentum where an increase in the radius (accumulator #2)(more mass) slows the RPM's unless supported by clubhead lag pressure- so the resisting Clubhead Deceleration in this context is really RPM deceleration during release of accumulator #2 and not Deceleration of the surface speed of the MPH of the clubhead as that is always picking up speed - (section 8-9 Release- the period of Clubhead acceleration.)

So I'm not saying that I my explanation completely explains the Glossary Item - "Acceleration", but without changing it to be more clear and consistent - that's the best I can do.