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On Forces active in the Golf Swing....

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  #21  
Old 03-19-2009, 03:26 PM
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That depends on the wind direction, but wait, I can't see the wind. Wind must be fictitious. The tide is in the coffee cup. That one still makes me scratch my head every morning........but I know its true.
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  #22  
Old 03-19-2009, 10:32 PM
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A Tide In the Affairs of Men
Originally Posted by BBax View Post

The tide is in the coffee cup. That one still makes me scratch my head every morning........but I know its true.
Right you are, BBax . . . There is a tide in your coffee cup! Difficult to see, I'll admit. So, for the best observation points:

Low Tide -- Starbucks.

High Tide -- Dunkin' Donuts.

Somewhere in between -- Waffle House.

Each is best observed at its extreme during the Full Moon, ideally at the Bay of Funday in Nova Scotia, Canada. But, if you're on the equator . . . furgeddaboudit. Tides ain't hap'nin, either in the oceans or in coffee cups. http://home.hiwaay.net/~krcool/Astro/moon/moontides/

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  #23  
Old 03-19-2009, 10:45 PM
Sligo33 Sligo33 is offline
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Originally Posted by BBax View Post
That depends on the wind direction, but wait, I can't see the wind. Wind must be fictitious. The tide is in the coffee cup. That one still makes me scratch my head every morning........but I know its true.
Often wondered what was going on with that Jack in the Box coffee.
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  #24  
Old 03-20-2009, 09:47 AM
KAPLOWD KAPLOWD is offline
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A Few Facts About Lunar Tides
--------------------------------------------------------------------------
The gravitational force of the moon is one ten-millionth that of earth, but when you combine other forces such as the earth's centrifugal force created by its spin, you get tides.
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  #25  
Old 03-20-2009, 09:56 AM
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Greg Anthony wrote a limited edition book back in the 1980’s that helped me understand how we use centrifugal force in the golf swing. The golf club moves in a curvilinear motion (part circular and part linear). We have come to know this as centrifugal force. Many of you are somewhat familiar with this concept. Whirling a rock on a string, the rock pulls away from the center. If the string breaks the rock would move at right angles to where the string broke, not in the direction of the string. Or when David killed Goliath…What has often been described as a “fictitious” force is actually a “tug of war” between Newton’s First Law of Motion and his Third Law of Motion.

Discounting the ever-present effects of gravity and friction, The Law of Inertia: There is no change in the motion of a body unless a resultant force is acting upon it. Specifically for this example, an object that has been set in motion will continue in motion and in a straight line until acted upon by another force.

If a second force acts upon the moving body at right angles to its path, it will be deflected from its rectilinear line, and its motion will become curvilinear. If a clubhead were set in motion in outer space it would continue in a straight line indefinitely. Once we attach a clubshaft to the clubhead and hold on to the opposite end of the shaft, the head would no longer move in a straight line because its forward motion would be constantly confined (deflected or constrained) by the clubshaft.

According to our friend Sir Newton (who IMO should receive and honorary degree in Golf Stroke Engineering from TGM) “the constant pull that constrains an object from its straight line path and compels it to move along a curve is called ‘centripetal force’ (centrum, center: petere, to seek).” The pull of centripetal force, as provided by the clubshaft, compels the clubhead to move in a curved path.

Sir Issac now enlightens us with his Third Law. For every FORCE there is an opposite and equal FORCE OF REACTION. Note, it does not say for every action…it says for every FORCE. In REACTION against this change in motion the object pulls outward on the shaft with a force called centrifugal REACTION.

When an object, not free to move is acted upon by an external force, it is pulled out of its natural shape, resulting in an elastic reaction in an attempt to resume its normal shape.

A force of REACTION is exerted by the reacting object, not on it. The resistance, that a moving body offers to deflection or constraint from a straight line, is commonly know as centrifugal force (Centrum, center: fugere, to flee from).

Mr. Kelley understood this when he wrote TGM. I have been using the term Centrifugal Force for years. If No-Mind wants to bash me for using it, fine. Just know that one of my students won three consecutive state open championships this past year using Centrifugal Force and countless other have improved their games with the same concept. I don't say that to impress you, but to impress upon you that the concepts presented by Mr. Kelley really work. In the end, that is all that matters.

BTW, Michael (Sligo33) if you want to talk about "tiding one over", I will remind you that you and I and Rob (BBAX) spent alot more time looking into our beers and vodka tonics than we ever did looking into our coffees.
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  #26  
Old 03-20-2009, 12:41 PM
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We DO have hero's
That is why you are my hero o' Silver Surfer of the Truth!
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  #27  
Old 03-20-2009, 03:52 PM
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Originally Posted by drewitgolf View Post
Greg Anthony wrote a limited edition book back in the 1980’s that helped me understand how we use centrifugal force in the golf swing. The golf club moves in a curvilinear motion (part circular and part linear). We have come to know this as centrifugal force. Many of you are somewhat familiar with this concept. Whirling a rock on a string, the rock pulls away from the center. If the string breaks the rock would move at right angles to where the string broke, not in the direction of the string. Or when David killed Goliath…What has often been described as a “fictitious” force is actually a “tug of war” between Newton’s First Law of Motion and his Third Law of Motion.

Discounting the ever-present effects of gravity and friction, The Law of Inertia: There is no change in the motion of a body unless a resultant force is acting upon it. Specifically for this example, an object that has been set in motion will continue in motion and in a straight line until acted upon by another force.

If a second force acts upon the moving body at right angles to its path, it will be deflected from its rectilinear line, and its motion will become curvilinear. If a clubhead were set in motion in outer space it would continue in a straight line indefinitely. Once we attach a clubshaft to the clubhead and hold on to the opposite end of the shaft, the head would no longer move in a straight line because its forward motion would be constantly confined (deflected or constrained) by the clubshaft.

According to our friend Sir Newton (who IMO should receive and honorary degree in Golf Stroke Engineering from TGM) “the constant pull that constrains an object from its straight line path and compels it to move along a curve is called ‘centripetal force’ (centrum, center: petere, to seek).” The pull of centripetal force, as provided by the clubshaft, compels the clubhead to move in a curved path.

Sir Issac now enlightens us with his Third Law. For every FORCE there is an opposite and equal FORCE OF REACTION. Note, it does not say for every action…it says for every FORCE. In REACTION against this change in motion the object pulls outward on the shaft with a force called centrifugal REACTION.

When an object, not free to move is acted upon by an external force, it is pulled out of its natural shape, resulting in an elastic reaction in an attempt to resume its normal shape.

A force of REACTION is exerted by the reacting object, not on it. The resistance, that a moving body offers to deflection or constraint from a straight line, is commonly know as centrifugal force (Centrum, center: fugere, to flee from).

Mr. Kelley understood this when he wrote TGM. I have been using the term Centrifugal Force for years. If No-Mind wants to bash me for using it, fine. Just know that one of my students won three consecutive state open championships this past year using Centrifugal Force and countless other have improved their games with the same concept. I don't say that to impress you, but to impress upon you that the concepts presented by Mr. Kelley really work. In the end, that is all that matters.

BTW, Michael (Sligo33) if you want to talk about "tiding one over", I will remind you that you and I and Rob (BBAX) spent alot more time looking into our beers and vodka tonics than we ever did looking into our coffees.
Be ready for an egghead assault . . . .
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  #28  
Old 03-20-2009, 04:35 PM
psheehan psheehan is offline
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Originally Posted by 12 piece bucket View Post

If Lynn don't first write a dissertation on fluid dynamics . . . . should he tie a knot in it and hope not to piss down his leg?
Now, that there is funny... reminds me of the dookey toofus discussions which I kind of miss.
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  #29  
Old 03-20-2009, 08:16 PM
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Originally Posted by psheehan View Post
Now, that there is funny... reminds me of the dookey toofus discussions which I kind of miss.
Ah yes . . . one that warms the soul.

You familiar with yatzee teef?
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  #30  
Old 03-20-2009, 10:02 PM
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Prince of Tides
Originally Posted by drewitgolf View Post

BTW, Michael (Sligo33) if you want to talk about "tiding one over", I will remind you that you and I and Rob (BBAX) spent alot more time looking into our beers and vodka tonics than we ever did looking into our coffees.
Hey . . . what about me?

Beer tide = low tide.

Vodka tide = high tide.

Su tide es mi tide!

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