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» <html><body><p>200 mExplanation:The relative speed between the two trains is :<a href="https://interviewquestions.tuteehub.com/tag/30-304807" style="font-weight:bold;" target="_blank" title="Click to know more about 30">30</a> - <a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a> = 20m/sThis is the <a href="https://interviewquestions.tuteehub.com/tag/initial-499269" style="font-weight:bold;" target="_blank" title="Click to know more about INITIAL">INITIAL</a> 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 <a href="https://interviewquestions.tuteehub.com/tag/stop-1228105" style="font-weight:bold;" target="_blank" title="Click to know more about STOP">STOP</a> making the velocity 0.V² = U² - 2as0 = 400 - 4s400 = 4sS = 100m</p></body></html>

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