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Old 02-25-2013, 05:55 PM   #17
julian
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Join Date: Dec 2006
Location: Bedford,Massachusetts,US
Posts: 2,503
Default It is one possibility

Quote:
Originally Posted by always_crosscourt View Post
Heavier = has more topspin on it.
It is one possibility.
The second possibility is some mathematical expression/combination
of a speed of a ball (immediately) after a contact plus a topspin
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