The hydraulic braking system for the truck and trailer is set to produce equal braking forces for the two units Chapter 3, Problem 3/199The hydraulic braking system for the truck and trailer is set to produce equal braking forces for the two units. If the brakes are applied uniformly for 9 seconds to bring the rig to a stopfrom a speed of 35 mi/hr down the 10-percent grade, determine the magnitude of the force P in the coupling between the trailer and the truck. The truck weighs 16,000 lb and thetrailer weighs 12,000 lb.35 mi/hr10100Answer: P =the tolerance is +/-2%lb

Answered: Chapter 3, Problem 3/199 The hydraulic…

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter21: Pavement Management

Section: Chapter Questions

Problem 10P

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The hydraulic braking system for the truck and trailer is set to produce equal braking forces for the two units. If the brakes are applied uniformly for 8 seconds to bring the rig (truck and trailer) to a stop from a speed of 32 mi/hr down the 5-percent grade, determine the force P in the coupling between the trailer and the truck. The truck weighs 19,000 lbs and the trailer weighs 15,000 lbs. State whether the coupling is in tension or compression.
The 14-Mg truck drives onto the 303-Mg barge from the dock at 16 km/h and brakes to stop on the deck. The barge is free to move in the water, which offers negligible resistance to motion at low speeds. Calculate the speed of the barge after the truck has come to rest on it. 16 km/h 303 Mg 14 Mg Answer: v = i km/h
6.11 A wheel tractor-scraper is operating on a level grade. Assume no power derating isrequired for equipment condition, altitude, and temperature. Use equipment data fromFigure 6.10. a. Disregarding traction limitations, what is the maximum value of rolling resistance (inlb/ton) over which the fully loaded unit can maintain a speed of 15 mph?b. What minimum value of coefficient of traction between the tractor wheels and thetraveling surface is needed to satisfy the requirements of part a? For the fully loadedcondition, 52% of the weight is distributed to the drive axle. Operating weight of theempty scraper is 74,946 lb.
A wheel tractor-scraper is operating on a 3% adverse grade. Assume no power derating is required for equipment condition, altitude, and temperature. Use equipment data from Fig. 6.7. Disregarding traction limitations, what is the maximum value of rolling resistance (in lb/ton) over which the empty unit can maintain a speed of 10 mph?
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III. Determine the horsepower produced by a passenger car travelling at a speed of 68 mi/hr on a radius of curvature of 1,200 ft road of 4% grade with a smooth pavement. Assume the weight of the car is 4500 lb and the cross sectional area of the car is 45 ft².
Help mee pleasee. Complete solution
Read the question carefully and give me all right solutions. A 1.36-ton passenger car with front cross-sectional area of 3.4 m2 wastraveling at a speed of 105 km/hr on a smooth pavement. Determine:a. The horsepower required to maintain speed on a straight and levelroadb. The horsepower required to maintain speed as the vehicle travels up a5% gradec. The horsepower required to maintain speed as the vehicle traversesonto a horizontal curve of 305 m radius
This is a type of load varies in length when getting the maximum internal forces of a structure. O Axle Loads O Moving load O Dead Load O Live Load
A 2500-lb passenger vehicle originally traveling on a straight and level road gets onto a section of the road with a horizontal curve of radius = 850 ft. If the vehicle was originally traveling at 55 mi/h, determine (a) the additional horsepower on the curve the vehicle must produce to maintain the original speed, (b) the total resistance force on the vehicle as it traverses the horizontal curve, and (c) the total horsepower. Assume that the vehicle is traveling at sea level and has a front cross-sectional area of 30 ft2.?
A 2500-lb passenger vehicle originally traveling on a straight and level road gets onto a section of the road with a horizontal curve of radius = 850 ft. If the vehicle was originally traveling at 55 mi/h, determine (a) the additional horsepower on the curve the vehicle must produce to maintain the original speed, (b) the total resistance force on the vehicle as it traverses the horizontal curve, and (c) the total horsepower. Assume that the vehicle is traveling at sea level and has a front cross-sectional area of 30 ft2. Show your solutions and answers.

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