I guess we've got to start somewhere.
I never realized the reason a slice requires less racquet head speed than top is because the ball is already spinning in that direction. Thanks FFF.
Let's kick it up a notch.http://www.physics.usyd.edu.au/~cross/tennis.html
This article summarizes the affect of poly strings. Very nice.http://www.theatlantic.com/magazine/archive/2011/01/the-new-physics-of-tennis/8339/
So I guess here's a good question-
If the ITF realized spahgetti strings would drastically alter the game and therefore banned the strings, why have they allowed racquet head sizes to increase and poly strings to be used? Both of those factors drastically impact the amount of spin a player can impart on the ball.
It would be like using aluminium bats in MLB, dropping the hoop to 8' in the NBA, or doubling the size of the net in soccer. Notice I didn't mention golf because that's not a sport.