Question

if you are riding on a train that speed past another train moving in a same direction on an adjacent track ti appears that the other train is moving backward why?

Answer 1

If you are traveling with a relativity constant velocity, then you will interpret your reference frame as being at rest. Since you are moving faster than the other train, the other train is moving backwards relative to you. Seeing the other train go past your window from front to rear makes it look like the train is going backwards

Step-by-step explanation: