A train driver moving at 40km|h applies break so that there is a constant retardation of 0.5m|s find time taken before the train stops

Answer 1

Vo = 40.000m/3600s = 11.11 m/s.

V = Vo + a*t = 0, 11.11 - 0.5t = 0, -0.5t = -11.11, t = 22.22 s.