A driver of train A moving at a speed 30m/s sees another train B going on the same track and in the same direction with speed 10m/s. he immediately applies brakes that gives his train a constant retardation of 2m/s2. What must be the minimum distance between the trains in order to avert a collision? (11th science physics)

A driver of train A moving at a speed 30m/s sees another train B going

1.	A driver of train A moving at a speed 30m/s sees another train B going on the same track and in the same direction with speed 10m/s. he immediately applies brakes that gives his train a constant retardation of 2m/s2. What must be the minimum distance between the trains in order to avert a collision? (11th science physics)
Answer» 200 mExplanation:The relative speed between the two trains is :30 - 10 = 20m/sThis is the INITIAL relative speed.When brakes are applied the train slows down.Given the acceleration = 2 m/s²u = 20 m/sWith time the train comes to a sudden STOP making the velocity 0.V² = U² - 2as0 = 400 - 4s400 = 4sS = 100m

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