A car driver travelling with a uniform velocity of 2m/s notices a railway level crossing at a distance of 435 m from him. And also he notices that it is going to be closed in 10 seconds. First he decides to cross the level crossing hence he accelerates his car at the rate of 2 ms2 for five seconds. Then he decides to stop the car. So he applies brake and stops the car exactly before the level crossing (without following the timer). Calculate the minimum rate at which he has to decelerate the car so that he stops the car exactly before the level crossing (A) 1.8m/s2 (B) 18 m/s2 (C) 0.18 m/s2 (D) 3.6 m/s2

A car driver travelling with a uniform velocity of 2m/s notices a rail

1.	A car driver travelling with a uniform velocity of 2m/s notices a railway level crossing at a distance of 435 m from him. And also he notices that it is going to be closed in 10 seconds. First he decides to cross the level crossing hence he accelerates his car at the rate of 2 ms2 for five seconds. Then he decides to stop the car. So he applies brake and stops the car exactly before the level crossing (without following the timer). Calculate the minimum rate at which he has to decelerate the car so that he stops the car exactly before the level crossing (A) 1.8m/s2 (B) 18 m/s2 (C) 0.18 m/s2 (D) 3.6 m/s2
Answer» Correct option is (C) 0.18 m/s²

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