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## Homework Statement

Particle mu was created in the atmosphere and traveled 2km relative to earth with a speed of 0.8c.

Particle e was created in the same time and traveled parallel to mu with the speed of 0.6c.

How much distance mu traveled relative to e?

## Homework Equations

Lorentz Transformations.

## The Attempt at a Solution

I've got an answer but I'm totally not sure.

https://dl.dropbox.com/u/27412797/classical_mechanics/question_5.jpeg [Broken]

You can't see this in the image but I calculated the relative speed of mu in regards to e and got (5/13)c

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