Re: [Phys-L] impacts

[Anthony Lapinski <alapinski@pds.org>]

Thanks for the cool video links! I wanted something simpler -- just a table
of impact times. I think I saw one in a physics book years ago.

On Fri, Nov 25, 2016 at 11:43 PM, John Denker <jsd@av8n.com> wrote:

> On 11/25/2016 07:47 PM, Anthony Lapinski wrote:
>
> > baseball on bat,
>
> If I were doing it, I might contact the photographer of
> one of the videos and beseech him for a clean copy.
>   https://www.uml.edu/Engineering/Mechanical/Staff/Drane-Patrick.aspx
>   https://scholar.google.com/scholar?hl=en&q=%22patrick+drane%22
> and/or
>   http://www.soraphotography.net/
>
> If those guys don't have what you want, they ought to be
> able to point you to somebody who does.
>
> ===============
>
> Failing that, you can take the brute force approach,
> perhaps starting here:
>   https://www.youtube.com/watch?v=QFlEIybC7rU
>
> They say it's 10,000 frames per second.  With a little
> effort you can probably count frames.  Cross check against
> plausible values of velocity.
>
> That's guaranteed to be correct, since they might have
> transcoded it for broadcast, so that the frame rate in
> the original camera might not equal the frame rate over
> the air, or on youtube.
>
> There's also this:
>   http://www.shutterstock.com/video/clip-4631723-stock-
> footage-baseball-player-hitting-ball-with-bat-shooting-with-high-speed-
> camera-phantom-flex.html
>
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