Thread: fly and train theory
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Old Sep 16, 2006 | 11:09 PM
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From: Portsmouth
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Originally Posted by biglee
yes i understand the resistance theory, what im asking is of a complete direction change, directly opposite the way the fly was going, it must stop to change direction it is imposible to go the oposite way on the same path without first stopping, so now we must say the train must stop...or we all fall into a big black hole and the universe eats itself...
Everything is relative - if the fly is "stopped", that only means it's not moving in relation to the ground - it's still moving around the sun in the solar system.

Easy way to think about it:

If the fly's doing 10mph and the train's going 70mph in the opposite direction, that's EXACTLY the same as if the fly is doing 0mph and the train's going 80mph - the fly still gets hit by the train exactly as hard, but there's no "stop" - it just accelerates almost instantly up to 80mph.

[edit - stupid fucking apostrophes ]
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