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Thread: paradox with relativity need help explaining

  1. #1 paradox with relativity need help explaining 
    Forum Sophomore somfooleishfool's Avatar
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    Ok so I'm certain this is not a paradox and I merely need to brush up on my relativity. someone help?

    you have object (A) travelling say 95% the speed of light in 1 direction and object (B) travelling in the opposite direction. relativity permits that you select any object as a point of reference, or, a point of "relativity". So my question is this. If you choose the point of view of particle A, and denote 0 velocity to particle A and say that A is not actually moving 95% the speed of light, it is simply stationary and other objects are just moving crazy fast. then isn't object B now traveeling 180% the speed of light away from object A?

    I think this next question is probably actually the same issue... but none the less, heres another similare issue.

    If you are in a really long space ship which is travelling at 99% the speed of light and you jump on your supercharged motorbike, inside the spaceship and push the turbo button and start travelling on ur motorbike at 99% the speed of light, from the reference point of an outside observer, are you travelling at 198% speed of light?


    Last edited by somfooleishfool; January 8th, 2014 at 06:39 AM.
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  3. #2  
    Bullshit Intolerant PhDemon's Avatar
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    I'll leave someone else who knows more to answer your question but I will say pick a better font colour. I could only read the OP after highlighting it.


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  4. #3  
    Forum Sophomore somfooleishfool's Avatar
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    Quote Originally Posted by PhDemon View Post
    I'll leave someone else who knows more to answer your question but I will say pick a better font colour. I could only read the OP after highlighting it.
    copy pasted the topic from elsewhere, didn't realize the font would come with
    edit:
    fixed it
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  5. #4  
    Brassica oleracea Strange's Avatar
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    The solution to this is that velocities do not add linearly (at "normal"speeds, the effect is so small that we don't notice it). The sum of two velocities will always be less than c.

    A good description here: Relativistic Velocities
    ei incumbit probatio qui dicit, non qui negat
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    Moderator Moderator Markus Hanke's Avatar
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    Ok so I'm certain this is not a paradox and I merely need to brush up on my relativity.
    Good ! That's most of the work already done
    In any case, Strange has provided the solution - relativistic velocities do not add linearly, as velocities in classical mechanics do.
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