I understand that the train would have in real life ripped appart, but then again in real life the train wouldn't be going at relative speed. also the length contraction would not neutralize the centrifical force at all, the tension on the train would still remain the same even if the train did...
Not true. While the top of the train may be traveling slightly faster, the bottom of the train would still contract at almost the same rate.
If a rocket were traveling at c-5mph, and a passenger on board were to run to the front at 10mph, would he be traveling at c+5mph?
a perfectly riged train and perfectly rigid planet would pose problems for relativity. the train would contract with infinite strength, while the planet would repel the squeazing with infinite strength.
suppose you had a planet with a train going all the way around the circumference. The train is a complete loop so you just have an endless train. now speed the train up to near c.
Because of length contration would the train begin to squeeze the planet?
I read on howstuffworks.com that in relativity there is time dilation and another dilation where the object shinks in the direction it is going. is this correct or not(if its not correct it will probably make no sense to you)