Question

A train is moving with constant velocity of 40 m per second .brake is applied and train come to rest after 55 seconds how much distance travelled by the train after applying the brakes

Answer 1

As we know that,

=> v = u+at
=> 0 = 40 + a x 55
=> -40/55 = a
=> a = - 0.8 m/s^2

Now,

=> S = ut + 1/2 x at^2

=> S = 40 x 55 + 1/2 x (-0.8) x 55 x 55

=> S = {2200 - (0.4 x 55 x 55) } m

=> S = (2200 - 1210) m

=> S = 990 m



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