"In this experiment, tennis balls are projected at 25 m/s (56 mph) on to a clamped tennis racket. Tests are conducted for a range of inbound ball spins between zero and 4000 rpm (400 rad/s)."
"The ITF Court Pace Rating (CPR) measures the effect of ball-surface interaction. This concept includes: friction, which primarily determines the reduction in the horizontal component of post-impact ball velocity; and vertical restitution, which determines the time between successive bounces."
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Microsoft Word - Two handed is superior to one handed backhand.doc
https://www.itftennis.com/technical/research/lab/spin/
https://www.itftennis.com/technical/equipment/courts/class.asp
http://www.itftennis.com/shared/medialibrary/image/staticarticle/IO_33564_staticarticle.JPG
https://www.itftennis.com/
