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## Main Question or Discussion Point

I am having trouble with measuring coordinate time in different inertial reference frames. For example:

Say a car is driving around a circular track (at constant v) and passes a stationary observer. I'll call this event A. Then the car makes another lap and passes the observer again (Event B). Say there are also two observers on a train that passes the track (also at constant v); one of these observers is present at event A and the other is present at event B. The observers on the train have synchronized clocks and calculate the time between A and B.

Do the observers on the train observe a different time than the stationary observer? If they do, how do you calculate the time they observe if you only know the speed of the train and the time observed by the stationary observer?

Thanks

Say a car is driving around a circular track (at constant v) and passes a stationary observer. I'll call this event A. Then the car makes another lap and passes the observer again (Event B). Say there are also two observers on a train that passes the track (also at constant v); one of these observers is present at event A and the other is present at event B. The observers on the train have synchronized clocks and calculate the time between A and B.

Do the observers on the train observe a different time than the stationary observer? If they do, how do you calculate the time they observe if you only know the speed of the train and the time observed by the stationary observer?

Thanks