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    ngasnier's Avatar
    ngasnier Posts: 30, Reputation: 4
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    #1

    May 13, 2009, 11:04 AM
    Gravity force vs inertial force
    Does Einstein's theory of relativity say that there is anyway to experimentally measure a difference between a force experienced by gravity and a force experienced by acceleration ?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    May 13, 2009, 11:52 AM

    Firstly, you should make sure you know the difference between special and general relativity. These are 2 different theories that Einstein helped to develop.

    Secondly, in general relativity, gravity does not exert a force. So I'm not sure how to answer your question.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    May 14, 2009, 09:07 AM

    I think what he's asking is: when a body experiences acceleration is there any way to determine whether that acceleration is caused by gravity versus it being caused by some other external force.
    ngasnier's Avatar
    ngasnier Posts: 30, Reputation: 4
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    #4

    May 14, 2009, 11:08 AM
    Quote Originally Posted by ebaines View Post
    I think what he's asking is: when a body experiences acceleration is there any way to determine whether that acceleration is caused by gravity versus it being caused by some other external force.
    Yes, when a body experiences a force: is there anyway to experimentally determine wheather it is due to gravity or due to acceleration?

    For example, if a space station is rotating (& the centifugal force "simulates" gravity), do the astronauts on the space station have any way to tell wheather they are experiencing a gravitational force or cetrifugal force?
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