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Chapter 9
List Features
By analyzing years of data, we found that it takes the driver of a car
approximately 0.75 seconds to react to a situation before actually applying the
brakes. Once the brake pedal is depressed, it takes additional time for the car to
come to a complete stop. Here is the equation used to compute total stopping
distance on dry, level concrete:
The reaction time distance (in feet) = 1.1 times the speed (in miles per hour);
The braking distance = 0.06 times the speed squared;
y = (1.1
× v) + (0.06 × v
2
),
where y represents the total stopping distance
(in feet), and v represents the speed (miles/
hour)
Calculate the total stopping distances at the
speeds of 30, 40, 50, 60, 70, 80 miles per hour.
CONCEPT
1. You can calculate all answers individually, but if you use list,
you can obtain the results with one calculation.
PROCEDURE