Re: [Phys-l] picket fence free fall vs. ticker tape timer

[Bernard Cleyet <bernardcleyet@redshift.com>]

The only result from a verity, picket fence,  search   in "The Physics 
Teacher".

A note:  "Improving Precision and Accuracy in the g Lab" (sic.)    It 
discusses, both free fall w/ PF and pendulum, determination of g  (SD 
~0.03% and 0.04 respectively, values w/in one SD and 0.1% high 
respectively -- despite buoyancy, and circular error correction. )

http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PHTEAH000038000006000367000001&idtype=cvips

In case you don't sub.  it's V 38 (Sept. 2k) p. 367 


bc, has computer will search.


p.s. request AJP search if desired.



FIZIX29@aol.com wrote:

> I remember reading an article last year on the error in using position-time 
> data (like a ticker-tape) in calculating the acceleration of a freely falling 
> object.  In particular, I think it referred to using position time data from a 
> "picket fence" apparatus with regularly spaced opaque and transparent strips 
> falling through a photogate.  I have searched my paper files and the internet 
> to no avail.  Does this sound familiar to anyone who could point me in the 
> proper direction?
>
> Thanks
>
> Justin Parke
>
>
>
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