An automobile is traveling 65km/h the brakes decelerate it at a rate of -6.0 m/s^2 how long will it take to stop the car?

Question

asked Aug 18, 2020 116k views

1 Answer

Landschaft · Answer 1 · 2020-08-25T09:27:30+0000

Step-by-step explanation:

It is given that,

Initial speed of the automobile, u = 65 km/hr =

Final speed of the automobile, v = 0

Deceleration of the automobile,
$a=-6\ m/s^2$

We need to find the distance covered by the car as it comes to rest. It can be calculated using third equation of motion as :

v^2-u^2=2ax

a=(v^2-u^2)/(2x)

a=(0-(18.05)^2)/(2* (-6))

$a=27.15\ m/s^2$

So, the acceleration of the car is
$27.15\ m/s^2$ . Hence, this is the required solution.