Question

please guys I want answers fastly!!!!!​

Answer 1

Explanation:

v=final velocity

u=initial velocity

a=acceleration

t=time

v=u+at

at=v-u

a=v-u/t

(b) u=54km/hr

v=0 ,on applying brakes

t=8s ,8s/3600=1/450

Using the formulae

a=v-u/t

a=0-54/1/1450

a=54/1/450

a=0.000041152266(ans)