Velocities of objects moving towards and away from each other

  • Context: Undergrad 
  • Thread starter Thread starter ilikescience94
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Discussion Overview

The discussion revolves around the velocities of two objects moving towards and away from each other, specifically focusing on the application of the velocity addition formula in special relativity. Participants explore whether the same equation applies in both scenarios and the implications of the speed of light on combined velocities.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions if the equation (V1+V2)/((1+((V1*VS)/(C^2)))) applies to both objects moving away from each other and those moving towards each other, noting a potential difference in combined velocities.
  • Another participant confirms the correctness of the equation for objects moving away from each other and emphasizes that the combined velocity cannot simply be V1 + V2 due to the constraints of the speed of light.
  • A later post provides a reference to additional background information on the velocity addition formula, including Einstein's derivation.

Areas of Agreement / Disagreement

There is a partial agreement on the use of the velocity addition formula, but uncertainty remains regarding its application to objects moving towards each other. The discussion does not reach a consensus on whether the same equation applies in both scenarios.

Contextual Notes

The discussion does not resolve the assumptions regarding the conditions under which the velocity addition formula is applied, nor does it clarify the definitions of the variables involved.

ilikescience94
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Am I correct in my understanding that two objects moving away from each other movee away from each other at the speed designated by this equation: (V1+V2)/((1+((V1*VS)/(C^2)))) I was wondering if this same equation was used to determine the velocity at which two objects move towards each other as well. It seems like it would be the same, but then again, I would think that the combined velocity of 2 objects would just be V1+V2, so I'm just being careful.
 
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Yes, you are correct with the equation.

Given that nothing can exceed the speed of light it is not possible for the combined velocity of two objects to be V1 + V2
 
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Alright sweet, thanks
 
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