Originally Posted by sureshs
Bhupaes confused the centripetal force with pulling to the right because he observed the tip of the hand moving to the left when the racket tip was moving to the right (due to wrist bend, etc). Later in the arc, the hand and the racket could both be moving to the right. So, focusing on one part of the arc does not provide the right picture. There needs to be a centrally directed force in any curvilinear motion, and the direction of the force changes from instant to instant.
No, I didn't confuse anything. If one were only depending on centripetal force, any muscle not used for gripping the racquet will be passive. Try swinging like that and see where the ball goes.
I will stick with everything I've said in this thread - let's just agree to disagree.