[no_mind_golfer]

BerntR

I don't know "fysics" but I do know PHYSICS and to be very picky in this case speed and velocity are synonymous. You say speed I say velocity we get the same answer.

Energy doesn't get banked (stored ... dollars in an account) ... the downswing converts potential energy to kinetic. Forces across levers create movement.... that's kinetic energy.

As for the rest... you are entitled to your beliefs. Some people never stop believing in Santa Claus or the tooth fairy. Now we must now agree to disagree.

nmg,

The stored energy I was referring to - its's nothing more mysterious than the swing speed at any time of the downswing. To be picky it's mass * speed^2 but it basically deals with the gradually build of swing speed throughout the down stroke.

This is very basic fysics. And perhaps the point is so self-evident that you looked for something more "exotic" in my statements.

The kinetic energy you are mentioning here is what I am basically conserned with. You are correct that it doesn't get stored for long. A significant part of it is spent at impact and the rest is wasted shortly after.

I have a really *big* problem seing how extensior action can be executed without loading the shaft. And shaft that is being loaded will reload when the moment is off.

The two-lever system complicates things. But if you're driving the primary lever around a quiet center - and if the primary lever is driving the secondary lever - I think it makes sense to speak of a swing center.

Further, I do not see a significant upside in moving this swing center around much.

Good golfers + instructors introduces all kind of "tricks" to hit the ball furter. And a lot of ordinary golfers gets confused. X-factor, late release and your "jump on your toe" by the end.

The reason I think the concept of work and energy storage is important in understanding the golf swing because:

1) As long as we can (more or less) accumulate energy until impact, it doesn't matter whether we energize the swing early or late. I don't regard the "late hit" as a magic formula for increased distance for instance.

2) Not even the purest swing is all about centripetal acceleration. Centripetal acceleration only helps us store the energy. We need to actively rotate mass to build swing speed. Tangential forces must be applied. Centripetal acceleration feels powerful but it doesn't add power.

3) A lot ofthe magic mystery moves that is supposed to increase swing speed is misleading.

A stroke pattern that enables the golfer to apply max tangential forces throughout, and at the same time provide the required centripetal force to carry the m*v2 until impact is as good as it gets as far as swing speed is conserned. If that doesn't produce enough swing speed it's time to hit the gym.