Question

A car starts from rest is accelerated uniformly of a velocity of 100.8kmhr it brake is applied in 4s find it

Answer 1

Explanation:

Given

u=0

v=144kmph=144×185=40m/s

t=20sec

We know,

v=u+at

40=a×20

a=2m/s2

Now,

s=ut+21at2

s=21at2=21×2×202=400m