SOLUTION: The formule D=0.054x^2+0.058x describes the distance in feet D that it takes to stop a vehicle traveling x miles per hour on dry pavement.
a. How fast can you drive if you wish
Algebra.Com
Question 534744: The formule D=0.054x^2+0.058x describes the distance in feet D that it takes to stop a vehicle traveling x miles per hour on dry pavement.
a. How fast can you drive if you wish to be able to stop your car within 65 feet?
b.On black ice, a truck's stopping distance is 3 times its stopping distance on dry pavement. A truck traveling 20 miles per hour applies the brakes, on black ice, at a distance of 65 feet in front of a rubber traffic cone. Will the truck hit the cone?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The formule D=0.054x^2+0.058x describes the distance in feet D that it takes to stop a vehicle traveling x miles per hour on dry pavement.
------
a. How fast can you drive if you wish to be able to stop your car within 65 feet?
Solve: 0.054x^2+0.058x = 65
---
Graph to find "x":
Ans: 34.16 mph
------------------------------------
b.On black ice, a truck's stopping distance is 3 times its stopping distance on dry pavement. A truck traveling 20 miles per hour applies the brakes, on black ice, at a distance of 65 feet in front of a rubber traffic cone. Will the truck hit the cone?
---
Normal stopping distance:
D(20) = 0.54*20^2+0.058*20 = 22.76 ft.
-----
On black ice: 3*22.76 = 68.28 ft
====================
Cheers,
Stan H.
====================
RELATED QUESTIONS
The formula D=0.054x^2+0.058x describes the distance in feet that it takes to stop a... (answered by ankor@dixie-net.com)
Formula D=0.054^2+0.058x describes the distance in feet D that it takes a vehicle... (answered by lmeeks54)
The formula D=0.054x^2+0.058x describes the distance in feet D that it takes to stop a... (answered by solver91311)
A model for the braking distance, d feet, required to stop a certain car when it is... (answered by ankor@dixie-net.com)
How many feet would it take a vehicle to stop if the vehicle was traveling 40 miles per... (answered by Fombitz)
If a vehicle is traveling 40 miles per hour, how many feet would it take for the vehicle... (answered by Fombitz,JBarnum)
PHYSICS—ENGINEERING For a car traveling at a speed of v miles per hour, under the best... (answered by TimothyLamb)
The number of feet it takes for a car traveling at x miles per hour to stop on dry, level (answered by ikleyn)
5. When the driver of a vehicle observes an obstacle in the road, the total stopping... (answered by math_tutor2020)