Ggthjy

What is GPS' 19 year rollover and does it present a cybersecurity issue?

Unbreakable Formation vs. Cry of the Carnarium

Finding files for which a command fails

Is there a way to make member function NOT callable from constructor?

Where to refill my bottle in India?

Ideas for 3rd eye abilities

Are cabin dividers used to "hide" the flex of the airplane?

Add an angle to a sphere

Why is the design of haulage companies so “special”?

Could Giant Ground Sloths have been a good pack animal for the ancient Mayans?

Extreme, but not acceptable situation and I can't start the work tomorrow morning

How to answer pointed "are you quitting" questioning when I don't want them to suspect

Landlord wants to switch my lease to a "Land contract" to "get back at the city"

What does it exactly mean if a random variable follows a distribution

Is domain driven design an anti-SQL pattern?

Lied on resume at previous job

Hosting Wordpress in a EC2 Load Balanced Instance

Is "plugging out" electronic devices an American expression?

Why was the "bread communication" in the arena of Catching Fire left out in the movie?

What is the offset in a seaplane's hull?

Email Account under attack (really) - anything I can do?

Re-submission of rejected manuscript without informing co-authors

Where else does the Shulchan Aruch quote an authority by name?

Are objects structures and/or vice versa?

Equivalence principle before Einstein [duplicate]

Did Galileo state the principle of equivalence in full generality?Was Aristotle really wrong about gravity?Why did Aristotle make mistakes in his laws of motion?Was Einstein the first person to think of the equivalence of a ball drop in an accelerated elevator and a ball drop on Earth?Why did Einstein develop General Relativity?Why couldn't Huygens explain diffraction using his principle?Why did Einstein oppose quantum uncertainity?Why did Tesla disagree with Einstein?The physical significance of $sqrt{-1}$ prior to EinsteinHow did Archimedes arrive at his principle in his time?Remarkable numerical calculations before electronic computers

5

$begingroup$

This question already has an answer here:

• 
  Did Galileo state the principle of equivalence in full generality?
  
  1 answer
  
  

In a German interview some physicists were asked, what they would ask Einstein, if he were alive today. One of them wanted to know how Einstein came up with the idea of the equivalence principle, that inertial mass is the same as gravitational mass. Correct me if I'm wrong, but I always believed that was known way before Einstein. And I have an experiment in mind where one famous guy standing on a leaning tower and letting two things fall with different mass to test if gravity acts on every object the same.

My question is, does somebody know the name of this famous person, who conducted the experiment? I can't remember it.

physics

share|improve this question

edited yesterday

Nick R

3,359723

asked 2 days ago

MaximMaxim

1263

$endgroup$

marked as duplicate by Conifold, Community♦ yesterday

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

migrated from physics.stackexchange.com 2 days ago

This question came from our site for active researchers, academics and students of physics.

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  $begingroup$
  Galileo Galilei, see en.wikipedia.org/wiki/Galileo_Galilei
  $endgroup$
  – hyportnex
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  $begingroup$
  "And I have an experiment in mind where one famous guy standing on a church and letting two things fall with different mass to test if gravity acts on every object the same." I think you mean Galileo Galilei.
  $endgroup$
  – Gert
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  I'm voting to close this question as off-topic because it's about the history of physics, not physics primarily.
  $endgroup$
  – Gert
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  It's also notable that he never did this experiment. He experimented with sloped planes, but the two body drop was his thought experiment: what if we connect the bodies with a piece of chain and then reduce and reduce its length until there is no chain?
  $endgroup$
  – kkm
  22 hours ago
  

  
  
  
  

add a comment | 

5

$begingroup$

This question already has an answer here:

• 
  Did Galileo state the principle of equivalence in full generality?
  
  1 answer
  
  

In a German interview some physicists were asked, what they would ask Einstein, if he were alive today. One of them wanted to know how Einstein came up with the idea of the equivalence principle, that inertial mass is the same as gravitational mass. Correct me if I'm wrong, but I always believed that was known way before Einstein. And I have an experiment in mind where one famous guy standing on a leaning tower and letting two things fall with different mass to test if gravity acts on every object the same.

My question is, does somebody know the name of this famous person, who conducted the experiment? I can't remember it.

physics

share|improve this question

edited yesterday

Nick R

3,359723

asked 2 days ago

MaximMaxim

1263

$endgroup$

marked as duplicate by Conifold, Community♦ yesterday

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

migrated from physics.stackexchange.com 2 days ago

This question came from our site for active researchers, academics and students of physics.

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  $begingroup$
  Galileo Galilei, see en.wikipedia.org/wiki/Galileo_Galilei
  $endgroup$
  – hyportnex
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  $begingroup$
  "And I have an experiment in mind where one famous guy standing on a church and letting two things fall with different mass to test if gravity acts on every object the same." I think you mean Galileo Galilei.
  $endgroup$
  – Gert
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  I'm voting to close this question as off-topic because it's about the history of physics, not physics primarily.
  $endgroup$
  – Gert
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  It's also notable that he never did this experiment. He experimented with sloped planes, but the two body drop was his thought experiment: what if we connect the bodies with a piece of chain and then reduce and reduce its length until there is no chain?
  $endgroup$
  – kkm
  22 hours ago
  

  
  
  
  

add a comment | 

$begingroup$

This question already has an answer here:

• 
  Did Galileo state the principle of equivalence in full generality?
  
  1 answer
  
  

In a German interview some physicists were asked, what they would ask Einstein, if he were alive today. One of them wanted to know how Einstein came up with the idea of the equivalence principle, that inertial mass is the same as gravitational mass. Correct me if I'm wrong, but I always believed that was known way before Einstein. And I have an experiment in mind where one famous guy standing on a leaning tower and letting two things fall with different mass to test if gravity acts on every object the same.

My question is, does somebody know the name of this famous person, who conducted the experiment? I can't remember it.

physics

share|improve this question

edited yesterday

Nick R

3,359723

asked 2 days ago

MaximMaxim

1263

$endgroup$

share|improve this question

edited yesterday

Nick R

3,359723

asked 2 days ago

MaximMaxim

1263

share|improve this question

edited yesterday

Nick R

3,359723

asked 2 days ago

MaximMaxim

1263

edited yesterday

Nick R

3,359723

edited yesterday

Nick R

3,359723

asked 2 days ago

MaximMaxim

1263

asked 2 days ago

MaximMaxim

1263

1 Answer
1

active

oldest

votes

11

$begingroup$

There are lots of different ways of stating the equivalence principle, and they're not all logically ... er ... equivalent to each other.

Names that come up in this connection, from before Einstein, are Galileo and Eotvos. Experiments that test the equality of gravitational and inertial mass are called Eotvos experiments.

Einstein's version of the equivalence principle is more radical than anything that Galileo or Newton envisioned. It entails throwing away the whole concept of a universal reference frame and instead defining inertial frames as local, free-falling frames. Previously, people had imagined that there was a frame of the "fixed stars," which was as good an approximation to an inertial frame as we would ever need. But according to relativity, observers in New York and Beijing can't even have the same frame of reference.

Taking the equivalence principle seriously also leads to the prediction of gravitational time dilation, which is something that nobody before Einstein had imagined.

share|improve this answer

answered 2 days ago

Ben CrowellBen Crowell

1,711825

$endgroup$

add a comment | 

11

$begingroup$

There are lots of different ways of stating the equivalence principle, and they're not all logically ... er ... equivalent to each other.

Names that come up in this connection, from before Einstein, are Galileo and Eotvos. Experiments that test the equality of gravitational and inertial mass are called Eotvos experiments.

Einstein's version of the equivalence principle is more radical than anything that Galileo or Newton envisioned. It entails throwing away the whole concept of a universal reference frame and instead defining inertial frames as local, free-falling frames. Previously, people had imagined that there was a frame of the "fixed stars," which was as good an approximation to an inertial frame as we would ever need. But according to relativity, observers in New York and Beijing can't even have the same frame of reference.

Taking the equivalence principle seriously also leads to the prediction of gravitational time dilation, which is something that nobody before Einstein had imagined.

share|improve this answer

answered 2 days ago

Ben CrowellBen Crowell

1,711825

$endgroup$

add a comment | 

11

$begingroup$

There are lots of different ways of stating the equivalence principle, and they're not all logically ... er ... equivalent to each other.

Names that come up in this connection, from before Einstein, are Galileo and Eotvos. Experiments that test the equality of gravitational and inertial mass are called Eotvos experiments.

Einstein's version of the equivalence principle is more radical than anything that Galileo or Newton envisioned. It entails throwing away the whole concept of a universal reference frame and instead defining inertial frames as local, free-falling frames. Previously, people had imagined that there was a frame of the "fixed stars," which was as good an approximation to an inertial frame as we would ever need. But according to relativity, observers in New York and Beijing can't even have the same frame of reference.

Taking the equivalence principle seriously also leads to the prediction of gravitational time dilation, which is something that nobody before Einstein had imagined.

share|improve this answer

answered 2 days ago

Ben CrowellBen Crowell

1,711825

$endgroup$

add a comment | 

$begingroup$

There are lots of different ways of stating the equivalence principle, and they're not all logically ... er ... equivalent to each other.

Names that come up in this connection, from before Einstein, are Galileo and Eotvos. Experiments that test the equality of gravitational and inertial mass are called Eotvos experiments.

Einstein's version of the equivalence principle is more radical than anything that Galileo or Newton envisioned. It entails throwing away the whole concept of a universal reference frame and instead defining inertial frames as local, free-falling frames. Previously, people had imagined that there was a frame of the "fixed stars," which was as good an approximation to an inertial frame as we would ever need. But according to relativity, observers in New York and Beijing can't even have the same frame of reference.

Taking the equivalence principle seriously also leads to the prediction of gravitational time dilation, which is something that nobody before Einstein had imagined.

share|improve this answer

answered 2 days ago

Ben CrowellBen Crowell

1,711825

$endgroup$

share|improve this answer

answered 2 days ago

Ben CrowellBen Crowell

1,711825

answered 2 days ago

Ben CrowellBen Crowell

1,711825

answered 2 days ago

Ben CrowellBen Crowell

1,711825