The plot shows the position (`x`) as a function of time (`t`) for two trains that run on a parallel track. Train `A` is next to train `B` at `t=0` and at `t=T_(0)`.

Options

A. At `T_0` both trains have the same velocity
B. Both trains speed up all the times
C. Both trains have the same velocity at some time before `T_0`
D. At `T_0` the trains have covered different distances.

Answer

C

Explanation

Initially slope of `A` is more than `B` and finally slope of `A` is less. So speed of `A` is initially more and finally less than `B`. So somewhere in between their speeds becomes same.