Homework Help: Galilean Relativity Question

1. Jun 3, 2013

Dgonzo15

1. The problem statement, all variables and given/known data
I came across this problem in a worksheet and I am completely lost as to where to start; can someone help? The question is:

Two trains are heading at the same speed, relative to the Earth, in opposite directions. A bomb explodes on each train, but not at the same times. An observer on train A says that the x-coordinate of bomb A was twice that of bomb B. An observer on train B, using the same origin and orientation, says that the x-coordinate of bomb B was twice that of bomb A. However, they agree on the time coordinates: bomb A's time coordinate was twice that of bomb B's. What are the x-coordinates of the bombs' explosions as measured by train B?

2. Relevant equations
x=x'-vt?

3. The attempt at a solution
I have no clue where to start; this problem doesn't make sense to me and I need some help to actually start this problem.

2. Jun 3, 2013

Fredrik

Staff Emeritus
Obviously, the first step is to translate the given statements into mathematical statements. This involves choosing a notation.

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