PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
7th Edition
ISBN: 9781119610526
Author: Mannering
Publisher: WILEY
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Chapter 2, Problem 2P
To determine
Distance back from the front axle to center of gravity that would ensure the maximum tractive effort developed for front and rear-wheel drive options is equal.
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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
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Chapter 2 Solutions
PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
Ch. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10P
Ch. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21PCh. 2 - Prob. 22PCh. 2 - Prob. 23PCh. 2 - Prob. 24PCh. 2 - Prob. 25PCh. 2 - Prob. 26PCh. 2 - Prob. 27PCh. 2 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - Prob. 33PCh. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - Prob. 36PCh. 2 - Prob. 37PCh. 2 - Prob. 38PCh. 2 - Prob. 39PCh. 2 - Prob. 40P
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- 3. Determine the horsepower produced by a truck traveling at a speed of BF km'h on a curved road (having curve radius of 8E) with 2.5% grade with a smooth pavement. Assume the weight of the truck is 19FD kg and the dimensions (front dimensions) of the truck is 25F cm by 14E cm. BF= 45 8E= 82 19FD= 1950 25F = 255 14E = 142arrow_forwardwhat is the coeficient of friction between the raod and the tires of the car is 0.60. the car weighs 3220 lb. it is rounding the curve at maximum seed. what is the value of the friction force in lb acting under a) the outer wheel b) the inner wheel.arrow_forwardSubject: Dynamics of Rigid Bodies Topic: Banking curves and superelevation 3.What is the safe maximum speed without tipping or skidding for a 13,200 N automobile running around a flat curve of 80 m radius? Its center of gravity is 0.60 m above the road surface and the wheel tread is 1.5 m, and f = 0.50. Please show the complete solution with its FBD. Thankyouarrow_forward
- 3. Determine the horsepower produced by a truck traveling at a speed of 82 km/h on a curved road (having curve radius of 82 ) with 2.5% grade with a smooth pavement. Assume the weight of the car is 1921 kg and the dimensions (front dimensions) of the car is 252 cm by 142 cm.arrow_forwardQuestion-- A vehicle is moving on a road of grade +4% at a speed of 20 m/s. Consider the coefficient of rolling friction as 0.46 and acceleration due to gravity as 10 m/s². On applying brakes to reach a speed of 10 m/s, find the required braking distance along the horizontal.arrow_forwardThe vehicle has a weight of 2600 lb and center of gravity at G. Determine the horizontal force P that must be applied to overcome the rolling resistance of the wheels. The coefficient of rolling resistance is 0.5 in. The tires have adiameter of 2.75 ft.arrow_forward
- A 12.5 kN car has a 2250 mm wheelbase, with its center of gravity located 550 mm from the pavement and 1150 mm behind the front axle. 3 people weighing on average 95 kg loaded the vehicle, shifting the center of gravity 115 mm nearer to the rear axle. What is the maximum tractive effort (N) that can be developed if the car is a rear wheel drive? Use coefficient of road adhesion= 0.46.arrow_forwardIII. 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.arrow_forwardA 11120 N car is designed with a 310 cm wheelbase. The center of gravity is located 60 cm above the pavement and 105 cm behind the front axle. If the coefficient of road adhesion is 0.6, what is the maximum tractive effort that can be developed if the car is (a) front-wheel drive and (b) rear-wheel drive? From the previous question, how far back from the front axle would the center of gravity have to be to ensure that the maximum tractive effort developed for front- and rear-wheel drive options is equal?arrow_forward
- 35. Determine the minimum speed of a car at the point the brakes are immediately applied to avoid a collision based upon a yaw mark chord measuring 70.4 feet and a middle ordinate measuring 6 feet. The drag factor C² M of the road surface is 1.4 (Use-Mand S=√15fr ) A. 34.2 MPH B. 9.9 MPH C. 16.4 MPH D. 47.2 MPHarrow_forward19 190 A car travelling at 40 mph on uphill grade of 5%. If the brakes are suddenly applied, it will travel 56 m. then stops. Determine the coefficient of friction between the road surface and the tires. Round off your answer to two decimal places.arrow_forwardThe angular displacement of the centrifuge is given by θ = 3.4[t + 29e-0.040t - 29] rad, where t is in seconds and t = 0 is the startup time. If the person loses consciousness at an acceleration level of 8.9g, determine the time t at which this would occur. Verify that the tangential acceleration is negligible as the normal acceleration approaches 8.9g.arrow_forward
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