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Message: <blockquote data-quote="Janx" data-source="post: 5666606" data-attributes="member: 8835">Maybe the problem is the involvement of light speed and its special rules.I got a really long train on tracks, with a racecar resting on the caboose facing forward.The train is rolling at 60MPH.The car then takes off, also at 60MPH.Relative to the train, the car is only going 60MPH (as it moves away from the caboose)Relative to police car sitting at the rail crossing, the racecar is 120MPH as measured from his fixed point in 2 readings when the radar bounces off the race car.i assume the statements and math to be correct.  Obviously, a physicist could prove me wrong.Now make it a space train with a spacecar on top.the train is going .4c to Alpha Centauri from eaththe car takes off again.  the caboose is receding from us at .4cthe car should be receding from us at .8cMake the train's speed be faster still, and the concept is meant to scale.Somehow, the magic of relativity and light speed however, make the math all funky.  From the concept of the car driver, time slows down, etc.But nobody gives a rats ass about the driver.  The point is, does the car go faster because it's starting speed is = train's speed when it takes off?Therefore, can it, from any vantage point, be going faster than the speed of light?never mind that it's a short term experiment, as the car will run out of train to race along.  Or that its forward movement will apply some negative movement to the train.</blockquote>

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