Relativistic mechanics

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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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@Granpa,

That's funny. Spaceship problems don't usually involve collisions.

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@Granpa,

Something tells me that most of the people we usually hear from are not going to get much help from that.

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@rosborne979,

I might suspect that this IS one of the people we have heard much from in the past few days.

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@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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Relativistic mechanics

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