Originally Posted by Jkramer
Good point. I was thinking about someone was hitting the ball on the fall (instead of hitting on the rise close to or inside base line) as in France Open, and stood close to back fence, which was 60 ft. All just guessing.
You reinforced a point I made earlier: for the tennis player, the equation is remarkably simple. Spin the ball over it's X axis with your racquet however you feel comfortable and practice, practice, practice, until you can hit the shots you want to reliably.
At this level of detail, where physics, angles of incidents, vectors, velocity, complex calculations, and the need for sensitive equipment and scientifically sound experiments are involved, the tennis player is expanding his tennis-related intellect--not his practical tennis skill. I would argue they are only very loosely related.