Question

a car moving along a straight highway with speed of 126 kilometre per hour is brought to a stop within a distance of 200 m what is the retardation of car as on uniform and how long does it take for the car to stop​

Answer 1

Answer:

ANSWER

u=126 km/h=126×185m/s=35m/s

v=0

s=200m

Newton's Equation of motion

v2−u2=2as

02−352=2a(200)

a=−3.0625m/s2

Also

v=u+at

0=35−3.06t

t=11.4s