Question

For a given motor vehicle, the maximum achievable deceleration from braking is approximately 8 m/sec2 on dry concrete. On wet asphalt, it is approximately 2.5 m/sec2. Given that 1 mph corresponds to 0.447 m/sec, find the total distance that a car travels in meters on dry concrete after the brakes are applied until it comes to a complete stop if the initial velocity is 67 mph (30 m/sec) or if the initial braking velocity is 56 mph (25 m/sec).

Answer 1

Step-by-step explanation:

= Acceleration on dry concrete =

= Final velocity = 0

= Initial velocity

= Displacement

For

The distance traveled to come to a stop is

For

The distance traveled to come to a stop is
.