![A vehicle is moving on a road of grade +4% at a speed of 20 m/s. Consider the coefficient of rolling friction as 0.46 and acceleration due to gravity as 10 m/s2](https://www.gkseries.com/blog/wp-content/uploads/2023/07/A-vehicle-is-moving-on-a-road-of-grade-4-at-a-speed-of-20-m-s.-Consider-the-coefficient-of-rolling-friction-as-0.46-and-acceleration-due-to-gravity-as-10-m-s2.jpg)
Q. A vehicle is moving on a road of grade +4% at a speed of 20 m/s. Consider the coefficient of rolling friction as 0.46 and acceleration due to gravity as 10 m/s2. On applying brakes to reach a speed of 10 m/s, the required braking distance (in m, round off to nearest integer) along the horizontal, is
Solution:
grade=+4%
v1=20m/sec
f=0.46
g=10m/sec2
v2=10m/sec
We know,
![](https://www.gkseries.com/blog/wp-content/uploads/2023/07/Screenshot-447.png)