You are driving a passenger vehicle traveling 65 mi/h on a non-treated section of US-460 Bypassaround Blacksburg on a sunny day. Assume a braking efficiency of 100%.A. If you apply the brakes and come to a complete stop, what is the theoretical stoppingdistance, the practical stopping distance if you use the AASHTO recommended decelerationrate, and the difference between the two?B. What is the practical stopping sight distance if you include the AASHTO recommendedperception/reaction time?C. As a young driver, your perception/reaction time is close to 1 second if you are payingattention. How much of a safety factor (ie how many feet) do you have between your actual(theoretical) stopping distance using 1 sec, and the practical stopping distance from part B?

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Answered: You are driving a passenger vehicle…

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter3: Motion Along A Straight Line

Section: Chapter Questions

Problem 53P: While entering a freeway, a car accelerates from rest at a rate of 2.40m/s2 for 12.0 s. (a) Draw a...

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A car is traveling at a speed of 33 m/s. (a) What is its speed in kilometers per hour? (b) Is it exceeding the 90 km/h speed limit?
February 3, 2009, was a very snowy day along Interstate 69 just outside of Indianapolis, Indiana. As a result of the slippery conditions and low visibility (50 yards or less), there was an enormous accident involving approximately 30 vehicles, including cars, tractor-trailers, and even a fire truck. Many witnesses said that people were driving too fast for the conditions and were too close together. In this problem, we explore two rules of thumb for driving in such conditions. The first is to drive at a speed that is half of what it would be in ideal conditions. The other is the 8-second rule: Watch the vehicle in front of you as it passes some object such as a street sign, and you should pass that same object 8 seconds later. On a dry road, the 8-second rule is replaced by a 3-second rule. a. Assume vehicles on a slippery interstate highway follow both rules. What is the distance between the vehicles? b. If a driver followed the first rule of thumb, driving at a lower speed, but used the 3-second rule instead of the 8-second rule, what is the distance between the vehicles? How does that distance compare with the visibility on the day of the accident? c. Suppose drivers do not follow either rule of thumb for slippery conditions. What is the distance between vehicles? How does that distance compare with the visibility on that day? d. Suppose a driver was not obeying either rule of thumb when she sees a tractor-trailer that stopped on the highway. She presses on her brakes, locking the wheels, and her car crashes into the truck. Estimate the magnitude of the impulse exerted on her car. e. Estimate the impulse on the car in part (d) had the driver followed both rules of thumb for slippery conditions instead of ignoring them.
(a) A car speedometer has a 5.0% uncertainty. What is the range of possible speeds when it reads 90 km/h? (b) Convert this range to miles per hour. (1Km=0.6214)
(a) A car speedometer has a 5% uncertainty. What is the range of possible speeds when it reads 90 km/h? (b) Convert this range to miles per how. Note 1 km = 0.6214 mi.
The given graph shows stopping distances for trucks at various speeds on dry roads and on wet roads. Use this information to solve, a. Use the statistical menu of your graphing utility and the quadratic regression program to obtain the quadratic function that models a truck’s stopping distance, f(x), in feet, on wet pavement traveling at x miles per hour. Round the x-coefficient and the constant term to one decimal place. b. Use the function from part (a) to determine speeds on wet pavement requiring stopping distances that exceed 446 feet.
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Attached photo. Please help! I need to know how to set it up.
a. Martin and Beatrice are brother and sister and go to the same school. Martin walks to school using a footpath, a distance of 900 m, and he walks at 1.5 m/s. Beatrice cycles to school along the roads, a distance of 1.5 km, and she cycles at 5 m/s. They both plan on arriving at school by 8.55 a.m. Who leaves home first and by how much?
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. Comment on any observation you made as you conduct the simulation.

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