Question

. Calculate the time take and the distance covered by a train moving with a velocity of 15 m/s to accelerate uniformly at the rate of 2 m/s^2 to reach a velocity of 20 m/s.

Answer 1

a = (V2 - V1) / t for uniform acceleration

t = (20 - 15/ m/s / 2 m/s^2 = 2.5 s

S = V1 t + 1/2 a t^2 distance covered

S = 15 * 2.5 + 2 / 2 * 2.5^2 = 37.5 + 2.5*2

S = 37.5 + 6.25 = 43.75 m