At 10:48 AM 4/10/2007, you wrote:
 >>
 >>   a ~= 74.38 g
 >
 >Ok, thanks, but that impact is what I'm looking to quantify.
 >I have times of 1/1000 to 1/2000 sec for the impact, various sources,
 >fair reliability I think.


A few potentially useful links:

"Physics of Baseball"

<http://webusers.npl.uiuc.edu/~a-nathan/pob/>

<http://www.iit.edu/~johnsonp/smart00/lesson3.htm>

<http://www.kettering.edu/~drussell/bats.html>

<http://www.amazon.com/Physics-Baseball-Robert-Kemp-Adair/dp/0060950471>

-- Alan

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