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Originally Posted by arnette
well, the speed of light would be 3x10^8m/s (although it would be slower in a real situation)
and assuming your speed of the ball is relative to the train conductor, and towards you, it would be 40m/s
what is the point of this?
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The point is if you are traveling towards someone and 10,000 mph and throw a ball in the same direction at 50mph,, the ball will come at that person at 50 mph plus 10,000 mph for a total of 10,050 mph.
This DOES NOT HAPPEN with light,, its always traveling at the same speed no matter what perspective you are measuring it from.