Speed of light, Mass, And black Holes

XeigerA
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Hey i have a question for anyone who wants to answer. Would an object moving at the speed of light which has infinite mass have infinite gravity? and if so would it also become a black hole? And if that's the case would a black hole with infinite gravity drag everything else at the same time or would it create a ripple effect around it where any observer's would notice the difference in the surrounding cosmologically, assuming they didnt notice the gravity shift themselves? How would that work?
 
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See the following article from the Usenet Physics FAQ:

http://www.physics.adelaide.edu.au/~dkoks/Faq/Relativity/BlackHoles/black_fast.html
 

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