Question

A car moving along a high way with a speed of
126 km per hour is brought to rest with in a distance
of 200 metre. How long (time) does it take for the car
to stop?
​

Answer 1

Answer:

A car moving along a high way with a speed of

126 km per hour is brought to rest with in a distance

of 200 metre. How long (time) does it take for the car

to stop?

Answer 2

Hi here is you answer

Step-by-step explanation:

distance travelled before coming at rest =200m

initial velocity of car =126km/hr= 35m/s

final velocity=0

using 3rd equation

v^2-u^2= 2as

a= (v^2-u^2) = 2as

(0-35^2)/2×200

-1225/400= -3.06m/s^2

using 1 st equation

v= u+at

0=35-3.06×t

t=35/3.06

so the answer is = 11.43 sec