Question

a car has a uniform acceleration of 4 km per sec want distance it will cover 10 sec after start

Answer 1

40km/hr= 11.11m/s
V=u+at
U=0
V=11.11*10
V=111.1m

Answer 2

convert 4 km into metre ,I.e 4000m
given,
u= o m/s
a=4000m/s^2
t= 10 s
s=?
use 2nd equation of motion
s= ut + 1/2at^2
s= o × 10+1/2 ×4000×10×10
s=0+200000
s=200000metres
s=200 km