Two trains travelling on the same track are approaching each other with equal speed of ` 40 m//s`. The drivers of the trains beging to decelerate simultaneously when just ` 2.0 km apart. Assuming deceleration to be uniform and equal the value to the deceleration to barely avoid collision should be .

Two trains travelling along a straight track are heading towards each other, travelling at 90km/hr and 100km/hr. Drivers of both the trains apply brakes together when the train are 1.0km apart, decelerating each train at 2.0m//s^(2) . Determine that whether the train accident will be averted.

Two trains, each travelling with a speed of 37.5kmh^(-1) are approaching each other on the same straingh track. A bird that can fly at 60 kmph flies off from one train when they are 90 km apart and heads directly for the other train. On reaching the other train, it flies back to the first and so on. total distance covered by the bird before trains collide is

Two trains are 2 km apart and their lengths are 200 m and 300 m. They are approaching towards each other with a speed of 20 m/s and 30 m/s, respectively. After how much time will they cross each other?