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Author Topic: Galileo's tower of Pisa experiment  (Read 11423 times)

Offline VAlibrarian

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Galileo's tower of Pisa experiment
« on: 28/08/2005 03:51:53 »
Galileo was once said to have offered a proof of his theory that size of falling objects is not related to their acceleration by dropping two objects of different sizes from the leaning tower of Pisa and noting that they struck the ground at nearly the same time. (forgive me if i have done a poor job of describing the principle of physics at work there)

Who can tell me of the even better proof that was offered for Galileo's theory centuries later?

chris wiegard


 

Offline daveshorts

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Re: Galileo's tower of Pisa experiment
« Reply #1 on: 28/08/2005 09:45:17 »
I am not sure if he actually did this experiment or if it was a thought experiment. The impression I had was he was rolling cannonballs down inclined planes and timing them with water clocks...
 

Offline VAlibrarian

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Re: Galileo's tower of Pisa experiment
« Reply #2 on: 29/08/2005 00:41:09 »
Yes he did the inclined plane test. But i think he was reputed to have done the leaning tower of Pisa experiment as well, in order to prove a point against someone.

Maybe someone can back me up on this one? I recall that one of the Apollo moon program astronauts dropped two dissimilar objects on the moon and verified that without air they did land at the same moment.

chris wiegard
 

Offline Ray hinton

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Re: Galileo's tower of Pisa experiment
« Reply #3 on: 05/02/2006 13:56:37 »
I BELIEVE IT WAS THE GREAT MAN HIMSELF"NIEL ARMSTRONG THAT DID THE EXPERIMENT,HE DROPPED A HAMMER AND A FEATHER, THEY STRUCK THE GROUND TOGETHER,THUS CONFIRMING WHAT GALILEO HAD SUGGESTED SOME TIME EARLIER[^]

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Offline VAlibrarian

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Re: Galileo's tower of Pisa experiment
« Reply #4 on: 13/02/2006 03:17:46 »
Yes, Ray, that is the event I was referring to. Thanks for confirming my rather hazy memory of that distant event.
In my opinion, that was a pretty cool way to prove Galileo's original hypothesis. I think the Lion's share of the credit still needs to go to Galileo himself, one of the greatest thinkers of the human race, and at the same time a great moral example.
His only problem was that he could not understand how others could fail to share his thirst for understanding.

chris wiegard
 

Offline Ray hinton

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Re: Galileo's tower of Pisa experiment
« Reply #5 on: 14/02/2006 23:51:15 »
Seeing them land on the moon was the biggest thing to happen in my lifetime so far,that and the loss of JFK,Galileo gets  all the credit from me,what a fantastic mind to even come up with these ideas,i have trouble working out tv remotes.
 

Offline Dr B

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Re: Galileo's tower of Pisa experiment
« Reply #6 on: 18/02/2006 18:08:57 »
Galileo used the following logic:  If a heavy object fell faster than a light object what would happen if you tied them together?  The lighter object would slow the heavier objects fall but now you have a really heavy composite object falling slower than the original heavy object.  Obvioulsy they must all fall together ...

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Offline Ray hinton

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Re: Galileo's tower of Pisa experiment
« Reply #7 on: 25/02/2006 21:20:29 »
light objects fall slower because of the friction with the atmosphere,yes ?.did gallileo know about the atmosphere or was that a later discovery.
i saw gallileos inclined plane demonstated on local heroes recently.
it was done with bells and they demonstrated that the bells were not evenly spaced,but spaced at increasing distances down the plane,gallileo worked out what the distance between each one would be to make the bells ring evenly,what a brilliant mind.

measure twice,cut once.
 

Offline ariel

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Re: Galileo's tower of Pisa experiment
« Reply #8 on: 14/03/2006 00:52:44 »
anyone here heard of galileo's sword?
 

Offline DoctorBeaver

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Re: Galileo's tower of Pisa experiment
« Reply #9 on: 14/03/2006 00:57:31 »
Ariel - i hear his wife was rather fond of it! :D

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Offline time-cop

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Re: Galileo's tower of Pisa experiment
« Reply #10 on: 20/05/2006 00:44:40 »
no answer doc,she didnt get it,or the sword [:0]

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Re: Galileo's tower of Pisa experiment
« Reply #10 on: 20/05/2006 00:44:40 »

 

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