Question

if a car at rest accelerates uniformly to a speed of 144 km/ hr in 2s it covers a distance of?

Answer 1

distance=speed/time
144/2=72

Answer 2

Here is your answer.

speed =144km/hr
= 144×5/18
= 40m/s
apply
v=u +at
v=40m/s
u=0m/s
a =?
t = 20m/s
40 = 0+20 × a
a= 2m/s square

apply

s=ut +1/2 at2

s = ?
u = 0m/s
a = 2m/s square
t= 2 sec

s = 0+1/2× 2 × 20×20
=20×20
s= 400m
Hence, car covers 400 metre.


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