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Re: [Phys-l] possible projectile lab



In the Florence museum:

http://brunelleschi.imss.fi.it/museum/esim.asp?c=404013

Not a duplicate of the original.

bc been there saw that, and his finger.




On 2009, Dec 16, , at 20:47, Gary Karshner wrote:

Dwight,
This is a real classic in the sense that Galileo used it to study
accelerated motion. He found the distance covered by the marble down an
inclined plane varied as the square of the time. He measured the time
intervals by using a series of frets that the marble would pass over with a
bump or ticking sound. He arranged the frets so the ticking was on the
musical beat thus placed at equal time intervals. Stillman Drake in his book
"Galileo at work" repeated the experiments from Galileo's notes. He also
wrote an article in Scientific American describing this work, in the 1970's
I think.
Galileo then goes on to calculate where the marble will land, and that
then end of his experiments on falling bodies. The kicker is that the marble
doesn't land where he expects because of the kinetic energy stored in the
rolling ball. He used the motion down the plane to determine the
acceleration of gravity.
So your experiment is true a classic one. good luck with it.
Gary
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