The various equations of linear motion of an object with uniform acceleration are given as follows: s=( u+v / 2)t … < 1 > v=u+at … < 2 > s=ut+at²/2 … < 3 > v²=u²+2as … < 4 > where, s =displacement u =initial velocity v final velocity t =time taken a =acceleration The question, A train is moving at a velocity of 25 ms^{-1 }, and it brakes with a deceleration of 2 ms^{-2 }before it stops. Find a) the time taken for the train to stop b) the braking displacement of the train^{ } |