a tran travelling at 20m/s under gas a uniform retardation of 2m/s. when brakes are applied calculate the time take to come to rest and the distance travelied form the place when the brakes were applied

Answer 1

you could use some proofreading, or better dictation software (or speak more clearly) ...

v = v0 + at, so
20 - 2t = 0
use that t to find s = vt + 1/2 at^2
s = 20t - 2/2 t^2 = ___