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Relativistic mechanics

 
 
Granpa
 
Sun 3 Jul, 2016 05:02 pm
I created the following to help people understand the basic ideas of relativity.

The bottom part shows the same interaction shown in the top part but from the point of view of a rocket moving toward the left at 0.999c. When checking the numbers be careful not to do too much rounding off. Some of the numbers are extremely sensitive to even very tiny changes.

https://commons.wikimedia.org/wiki/File:Relativistic_Energy_and_Momentum.png

Image is public domain

https://upload.wikimedia.org/wikipedia/commons/b/b3/Relativistic_Energy_and_Momentum.png
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Type: Discussion • Score: 2 • Views: 1,316 • Replies: 4
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maxdancona
 
  1  
Sun 3 Jul, 2016 05:55 pm
@Granpa,
That's funny. Spaceship problems don't usually involve collisions.
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rosborne979
 
  1  
Sun 3 Jul, 2016 06:57 pm
@Granpa,
Something tells me that most of the people we usually hear from are not going to get much help from that.
roger
 
  1  
Sun 3 Jul, 2016 07:15 pm
@rosborne979,
I might suspect that this IS one of the people we have heard much from in the past few days.
maxdancona
 
  1  
Sun 3 Jul, 2016 07:19 pm
@roger,
I suspect Granpa actually doesn't actually understand relativity. I couldn't find where the diagram came from... but it is a typical problem involving a collision of particles (the spaceship moving left... without specifying a frame of reference is a strange way to word this)

Maybe Granpa can explain in more detail where he is going with this.
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