The graph shows position as a function of time for two trains running on parallel tracks. Which statement is true?

Question

The graph below represents velocity time graph for a car starting from rest , the graph has three sections AB, BC and CD.

The graph shows position as a function of time for two trains running on parallel tracks. Which statement is true?

1) At time t_B both trains have the same velocity 

2) Both trains have the same velocity at some time after t_B

3) Both trains have the same velocity at some time before t_B 

4) Somewhere on the graph, both trains have the same acceleration

Answer 1

Correct option is 3) Both trains have the same velocity at some time before t_B