Question

Solve this question.

Answer 1

144km/h=144x5/18=40m/s=v
V=at
40=a*20
a=2m/s^2
D=1/2at^2
D=400

Answer 2

$\bold{Hello}$


As in the question , it's given that the car is under constant acceleration , so we will use equation of motion.


Step-1 ) v = u + at

here , u = 0

→ v = at

→ a = v/t

in the question , v = 144 km/hr = 40 m/sec


→ a = 40/20

Acceleration ( a ) = 2 m/s^2


Step-2 ) s. = ut + 1/2at^2

here also , u = 0

→ s = 1/2at^2


→ s = 1/2 × 2 × 20 × 20


distance travelled => $\bold{400 m}$





Hope It Helps You. ^_^