PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
7th Edition
ISBN: 9781119610526
Author: Mannering
Publisher: WILEY
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Chapter 2, Problem 36P
To determine
The acceleration of the car if the driver was accelerating quickly to avoid a collision.
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8 ft wheelbase
Rear-wheel drive
Center of gravity 17 inches above the road 4.1 ft behind the front axle.
The car weighs 2500 lb
Mechanical efficiency of the drivetrain is 93%
Wheel radius is 14 inches.
If the engine develops 190 ft-lb of torque and the overall gear reduction ratio is 7
to 1, what is the maximum acceleration from rest for the car? Assume good, dry,
and level pavement conditions.
The 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.
a 2500-lb car designed with a 120-inch wheelbase. the center of gravity is located 22 inches above the pavement and 40 inches the front axle. if the coefficient of road adhesion is 0.6, 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 option is equal?
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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- A car is traveling at 76 mi/hr down a 3% grade on poor, wet pavement. The car's braking efficiency is 90%. The brakes were applied 320 ft before impacting an object. The car had an antilock braking system, but the system failed 200ft after the brakes had been applied (wheels locked). What speed was the car traveling at just before it impacted the object? (Assume theoretical stopping distance, ignore air resistance, and let Frl=0.015)arrow_forwardA ASHOK LEYLAND REQUIRED TO ACCELERATE AT A RATE OF 2 /SEC 2 IN THE FIRST GEAR FROM A SPEED OF 15 K.P.H THE GRADIENT IS + 3 PERCENTAGE AND THE ROAD HAS A BLACK TOPPED THE FRONTAL PROJECTION AREA OF THE CAR IS 3.0 M2.THE CAR TYRES HAVE A RADIUS OF 0.50 M. THE REAL AXLE GEAR RATIO IS 3.82 :1 AND THE FIRST GEAR RATIO IS 478 :1 .CALCULATE THE ENGINE HORSEPOWER NEEDED AND THE SPEED OF ENGINE. ASSUMING F= 0.04, TRANSMISSION EFFICIENCY OF 0.80, TYRE DEFORMATION FACTOR = 0.85, RO=0.60arrow_forwardThe rated speed of a highway curve of 200 ft radius is 40 mph. If the coefficient of friction between the tires and the road is 0.26, (a) What is the maximum speed at which a car can round the curve without skidding?arrow_forward
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