I'd like to know the ball speed out of the racket for any strike (example: the service), and the speed just before the rebound, to have an idea of the speed loss due to air resistance...
Anyone knows where I could find this ..?
of course the instantaneous velocity of the ball is going to decrease after you strike the ball due to air resistance/rebounding effect.
but I guess the way they calculate the serve/strike speed is just using the distance between the hitting and rebounding point over the time lapse between the 2 points.
so it's something like average speed.
I remember in Dubai this year, they showed this kind of things on TV and Roddick's 220km/hr serve was just 150km/hr something when the ball reached the racket of his opponent.