This is a semantics argument. FWIW I think people use "kick' to refer to twist serves (as the finish is a touch different on a kick vs. an american twist)...
Are you contradicting yourself here or merely disagreeing with how "people" use the terms? You parenthetical remark indicated that there is a diff between a kick serve and an American Twist even tho' "people" use the terms synonymously.
You can dismiss it as a semantics argument, but there are clearly 2 camps on this issue. I've heard it used both ways. Once camp insists that terms, kick serve and twist serve are synonymous. The other camp says that a kick serve refers to
any serve with with topspin that has a higher than normal bounce. This camp views the twist serve as one type of kick serve. There is no general consensus or standard on the term, kick serve.
As I had indicated back in
post #16, the term, kick serve, is a very general term and rather ambiguous (as indicated by quite a few sources).
agreed. semantics issue. modern tennis players would tell you that a kick serve is one that for a righty bounces up and to the right, topspin would bounce in the same direction as the path traveled and a slice would tail out to the left.
Many, but not all, topspin serves have a high bounce. How do you make a distinction between a low-bouncing topspin serve and a high-bouncing topspin serve if you don't have a class of topspin
kick serves?
Note that even tho' slice serves "tail out to the left", they do not necessarily continue to break to the left. The (vertical axis) side spin has no effect on the bounce itself. I don't believe that the ball has much, if any, residual side spin after the bounce. Therefore it would possess Magnus forces that would cause it to break further to the left -- after the bounce it follows a path that had been dictated by its pre-bounce direction. So we can say that a slice serve would also tend to "bounce in the same direction as the path traveled".
However, a slice serve can sometimes posses enough
CCW (anti-clockwsie)
spiral spin to cause the ball to bounce a bit more to the left than normal. Note the the spiral spin on a twist serve is
CW (clockwise) causing it to bounce to the right (from the perspective of a right-handed server).
Note that the bounce on a topspin kick serve or a topspin-slice kick serve may appear to straighten out or just kick straight up (not left or right). In this case, the spiral spin component is not sufficient enough to cause a noticeable deviation to the right or the left.