[Triad]

Actually, Triad, I surmized that the extensor action in the tetherball example was muscular at the start but then a resultant force thereafter.

Coophitter, I understand your point and agree with you. My assertion however was that once the ball has been struck by the right hand and the right arm is fully extended you have reached a Follow-through condition of both arms straight. (I believe I inadvertantly said 'finish condition' in my previous post.

After the Follow-through is where the analogy with a golf stroke ends. The resultant swing of the rope is just a reaction to that 'golf-swing' (hit, actualy). Even if we were to assume that the continued swinging of the rope around the pole is part of the golfswing and driven by centrifigal force or momentum transfer rather than muscular driven extensor action we still should be able to agree that extensor action is evident all the way to the both arms straight condition since the left hand is holding the rope taught while the right arm drives through the tetherball. Not sure if I am being very clear. Am I making any sense here?