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				gy. And what I wanted to show is that the potential energy would increase as well as kinetic energy as they moved closer because of that inverse square relation. I don't truly care about impact, I want to see what it looks like going towards impact.
			
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 err, shouldn't potential energy decrease?
 
U=-GM/r
 
as r decreases, U decreases.  
		
		
		
		
		
			
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