Linear and Angular Momentu

[uspta146749877]

Comparison of forehands by Murray and Tsonga.
See
High Performance Coaching Newsletter

Volume 9, Number 3

at will be posted
in couple of days
at

http://www.playerdevelopment.usta.com/news/fullstory.sps?inewsid=448849

Not posted as of Jan.17 2009

Question:
is it possible to deduce just from piictures/videos which player produces
a quicker ball?