Where s the moving train on the embankment?

[DrGreg]

Like this?

Yes, that looks good to me except for one small but important detail. You have x and −x the wrong way round in Fig 2.

It's worth pointing out the two red lines on your two diagrams don't represent the same thing. The first goes from left to right, the second goes from right to left. If you wanted, you could draw both lines on both diagrams.

Is it all making sense now?

 

[Grimble]

Yes, that looks good to me except for one small but important detail. You have x and −x the wrong way round in Fig 2.

It's worth pointing out the two red lines on your two diagrams don't represent the same thing. The first goes from left to right, the second goes from right to left. If you wanted, you could draw both lines on both diagrams.

Is it all making sense now?

http://img109.imageshack.us/img109/2534/spacedgms.jpg

Thank you, DrGreg, for your assistence. I believe this is right now?

Grimble

 

[Ich]

Ok, two things:

- You included an old version of fig. 1.
- I realize that you still have the wrong inclination of worldlines and x/x'-axis.

In order to answer your original question, you must draw accurate diagrams, with v=0.866.
I could provide the correct diagrams, but I think that would be counterproductive. Try it yourself. Ask if you're getting stuck.