Question

Trains A and B are running parallel to each other at equal speed.State whether a person in train A will be in a state of rest or motion with respect to

Answer 1

Answer:

Here comes the concept of relative velocity in view. :)

First off the trains are running parallel to each other that is the displacement of a person sitting in train A will be in the same direction as that of the person sitting in train B.

Secondly, the trains are running at equal speed meaning that in equal intervals of time people in both the trains will have equal displacement.

Now suppose, a child sitting in train A looks outta the window to train B he'd see that the person parallel to him on that train is not moving at all ( or he'd think so) as both of them are moving in the same direction and with the same speed. Even Tho they're moving they appear still to each other.

Relative velocity = velocity of Train A - velocity of train B

= since both of them are equal relative velocity is 0 that is the trains are still with respect to each other.

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Hope this helps!