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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Walking on a train
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A train of proper length L and speed 3c/5 approaches a tunnel of length L. At the moment when the front of the train enters the tunnel, a person leaves the front of the train and walks (briskly) toward the back. He arrives at the back of the train right when it leaves the tunnel.
(a) How much time does this take in the ground frame?
(b) What is the person’s speed with respect to the ground? (c) How much time elapses on the person’s watch?
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