PRIN.OF HIGHWAY ENGINEERING&TRAFFIC ANA.
7th Edition
ISBN: 9781119610526
Author: Mannering
Publisher: WILEY
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Question
Chapter 2, Problem 18P
To determine
(a)
The initial speed if the aerodynamic resistance is considered.
To determine
(b)
The initial speed if the aerodynamic resistance is ignored.
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A 2400-lb vehicle (CD = 0.38, Af = 26 ft², and p 0.002378 slugs/ft³) is driven on a
surface with coefficient of adhesion equal to 0.8 and a coefficient of rolling friction of 0.014
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A 15.6-kN vehicle (Cd = 0.40, Af = 2.4 m2, rho = 1.2256 kg/m3) is driven on a surface with a coefficient of adhesion of 0.5, and the coefficient of rolling friction is approximated as 0.015 for all speeds. Assuming minimum theoretical stopping distances, if the vehicle comes to a stop 76 m after brake application on a level surface and has a braking efficiency of 0.78, what was its initial speed (a) if aerodynamic resistance is considered and (b) if aerodynamic resistance is ignored?
O-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 (in m, round off to nearest integer) along the horizontal.
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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