Question

a car is moving with a uniform velocity 72 Km/hr . on applying breaks it comes to rest after traveling a distance of 200m. calculate the retardation and tike taken to come to rest.​

Answer 1

V2=u2+2as so we gate a=-1m/s2 then use v =u+at we put final v= o’u=20m/s and a=_1 we get t=20 sec