PRINCIPLES OF HIGHWAY ENGINEERING+TRAFF
7th Edition
ISBN: 9781119688372
Author: Mannering
Publisher: WILEY
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Chapter 2, Problem 15P
To determine
The distance from the front axle to the center of gravity so that it develops maximum acceleration.
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Find the angle of banking for a highway curve of 90 m radius for cars traveling at 128 Km/hr, if the coefficient of friction between the tires and the road surface is 0.40. What is the rated speed of the road? (In rated speed, the friction force between the tires and the road is zero)
Situation 3. A road having a radius of 120m and has angle of 9.31 degrees from the horizontal. The center of gravity of the car is located 0.80m above the roadway and the distance between the two front wheels is 1.20m. If the car has a total weight of 15 KN,
a. Compute the normal acceleration and the velocity of the car before overturning.
b. If uk= 0.60, what is the velocity of the car without sliding?
Please answer this with a complete solution and with a Free Body Diagram PLEASE. Thank you.
compute the braking distance (in meters). if a vehicle is moving down at a speed of 83 kph along an inclined surface (G = 2%). and the coefficient of friction is 0.33.
Chapter 2 Solutions
PRINCIPLES OF HIGHWAY ENGINEERING+TRAFF
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- A vehicle is moving down at a speed of 80 kph along an inclined surface (G = 2%). If the coefficient of friction is 0.33, compute the braking distance in meters. Round off to two decimal places.arrow_forwardA car is to be driven up a 7° incline road. Determine the automobiles braking distance from 30 m/s if the brakingdistance at 25 m/s speed is 45m when applied on a horizontal plane. Determine the braking distance going down a 5% incline. Assume the braking force is independent of the slope.arrow_forwardFind at what maximum speed a vehicle can move round a curve of 50 m radius without slip on a road banked with 1 in 10 slope? Take coefficient of friction between the tyres of the vehicle and the road equal to 0.4 Correct answer is 57.53 kpharrow_forward
- The car is traveling at a constant speed through a dip in the road. The radius of curvature of the road at point A, the bottom of the dip is 396m. What speed of the car (kph) would result in an acceleration of magnitude 0.2g when the car is at A?arrow_forwardA concrete highway curve with a radius of 500 ft. is banked to give lateral pressure equivalent to friction = 0.15. For what coefficient of friction will skidding impend for a speed of 60 miles per hour?arrow_forwardOne of the two motor vehicles is moving up the ramp at 90 km / h on a road with a slope of 3%, the other goes down the ramp at a speed of 20 km / h on the opposite lane. What should be the shortest distance for two vehicle drivers to see each other in order to prevent collision by braking? The reaction time is 2.0 seconds and the sliding friction coefficient is 0.25.arrow_forward
- A truck travels along a straight, level road at the speed of 79ft/sec. when the driver is forced to apply the breaks to avoid an accident. If the truck undergoes a constant deceleration of 14ft/sec2, how far does the truck travel before coming to a complete stop?arrow_forwardspeed of 35 m/s. If the brakes are applied and the speed of the car is reduced to 10 mls in 15 s, determine the constant deceleration of the cararrow_forwardThe car has a mass of 1.6 Mg and center of mass at G. If the coefficient of static friction between the shoulder of the road and the tires is μs = 0.4, determine the greatest slope θ the shoulder can have without causing the car to slip or tip over if the car travels along the shoulder at constant velocity.arrow_forward
- Subject: Dynamics of Rigid Bodies Topic: Banking curves and superelevation 2. Find the angle of banking for a highway curve of 90 m radius for cars traveling at 128 Km/hr, if the coefficient of friction between the tires and the road surface is 0.40. What is the rated speed of the road? (In rated speed, the friction force between the tires and the road is zero) Show the complete solution and its FBD.arrow_forwardA vehicle weighing a 50 kN is moving at a constant speed around a circular curve. Neglecting the friction between the tires and the pavement and the centrifugal ratio (the ratio of the centrifugal force experience by the vehicle on the curve to its own weight) is 0.30. The degree of the curve is 5 degrees.a. Calculate the centrifugal force.b. Calculate the maximum speed the vehicle could move around the curve (in kph)c. If the skid resistance is 0.15, calculate the maximum super elevation that can be provided for the speed calculated from b.arrow_forwardA driver driving at 69 kph at a straight flat portion of the highway suddenly encounters an obstruction. He applies his brakes. If the coefficient of friction of the roadway to the tires is equal to 0.5, calculate the maximum safe distance (rounded to the nearest meters) the driver can apply his brakes to avoid collision. g = 9.81 m/s^2arrow_forward
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