[no_mind_golfer]

Ocean front property in Arizona sounds better....

Not florida....

Oh and I would like it proven also. .

COAM....

Stands for Conservation of Angular Momemtum (I alpha^2) where alpha is angular acceleration.

At the top of the back swing... How much angular momentum is there?

1/3 of the way down.. How much?

Half Way down?

and at impact?

Easy right? At the top there is none... zero... zip... nada. Things are stopped. 1/3 of the way down... There is some.. things have begun to move
1/2 way down... There's even more... now the golfswing is really picking up speed and starting to rotate fast. Finally at impact? Maximum momentum, maximum rotation *that is unless you subscribe to some ignoramus teacher's ridiculous theory of kinetic chain snapping in which case you've probably lurched yourself to a halt and incurred a mishit*

If angular momentum is increasing as the downswing progress' all but the dimmest among us must agree, then by definition angular momentum it is NOT being conserved. (If as time progresses you have more or less of somthing it is NOT being conserved). COAM does not apply to the golfswing and I refer you to any physics or mechanics textbook if you disagree with this definition of COAM.

Dante wrote a pretty good book back in the 60's (5 magic moves). In it he had stroboscopic pictures of one golfer whose hands slowed down before impact (they almost came to a halt in fact). Dante extrapolated from his sample of one (never a good thing to do btw) to all golfers.

Since he did not know how to explain this observation himself, Dante consulted a physics teacher who told him the golfers hands slowed down because of COAM (sounds good in theory.... but wrong ... for the reason given above). Also note the: "Appeals to authority" logical fallacy. He's a physics teacher so he knows right? wrong. Perhaps Dante should have consulted with more experts to confirm the firsts explanation and golf instruction would not be mired in this COAM myth. Hind sight is of course 20-20.

It turns out very few people swing a golf club like Dante's stoboscope model anyway. In fact Nesbit's data shows most golfers (especially the better ones) accelerate their hands all the way to impact. (See figure 4 http://www.motionanalysis.com/pdf/2005_nesbit.pdf ) BTW... Nesbit used the finest "3d machine" available to acquire his measurements. Some people choose to ignore that which does not fit their preconceived notions especially slayers of windmills.

PS

Check out fig. 7 of the linked pdf. That's angular velocity. For those who did not make it to (or forgot) calculus, the slope of that curve is angular acceleration. Note its increasing for all golfers right up to impact. Angular momentum IS NOT being conserved during the golf swing. Have a good day!