[BerntR]

Physics crash course for swingers:

If you drag load and use extencior action, basically all of the swing power will be channeled through left arm.

Towards impact, the left arm will deliver a big portion of centripetal force - and a small portion of something else. The REAL force is what it is, but when you look at it in physics it helps to decompose it into two parts. Centripetal is the first part and it doesn't produce swing speed. It only keeps the club head in orbit. But if you (still) move the shoulder around the spine, you are always pulling towards a spot that stays in front of the swing center. And then you are also producing a second part. That second part is also a LINEAR force component to the pulling. And that component produces swing speed. The key for the swinger's swing production of swing speed is to always pull towards a point that is forward of the swing center. The physics is quite similar for the hitter, except that (s)he pushes towards a spot that is forward of the swing center.

Centrifugal force: Homer defined this as club head inertia, basically and Newton agrees with Homer here. CF produces the throw-out or the release. This release will slow down the hands - perhaps even reverse their motion - unless the golfer resist it. It is this resistance that produces swing speed during the release interval.

Bottom line: If the club head feels really heavy you're producing swing speed. Homer also spoke of the heavy "hit". Which literally means acceleration all the way to impact. The man knew what he was talking about....