Why is the relativistic mass a rejected concept?

[PAllen]

No. It is not length contracting in its own frame. The density of the object is not increasing.

I hope you realize that was a joke, poking at my insistence that if only we stop using relativistic mass, newbie questions about fast moving objects will turn into black holes will go away. Atyy certainly doesn't believe that a black hole would form. Getting the joke, and the point, I responded, "no that's a black pancake, not a black hole".

 

[Drakkith]

I hope you realize that was a joke, poking at my insistence that if only we stop using relativistic mass, newbie questions about fast moving objects will turn into black holes will go away. Atyy certainly doesn't believe that a black hole would form. Getting the joke, and the point, I responded, "no that's a black pancake, not a black hole".

It makes so much sense now!

I guess that's what I get for not reading the whole thread lol.