4. A car skidded going into an intersection, struck a pedestrian, and continued until it hit a tree. Based on the damage to the front of the car, it is estimated that the car was doing 10 kph at impact with the tree. The length of the skid marks was measured at 42 m. The road is on a downhill grade -5 percent. A test car skidded 15.5 m on the same section of rod when braked from a speed of 45 kph to a halt a.) What is the coefficient of friction between the tires and the pavement ? b.) What is the probable speed of the car involved in the accident when the brakes were applied ? c.) If the perception reaction time of the driver is 1.5 seconds, what could have been its minimum total stopping distance to avoid the crash ?
4. A car skidded going into an intersection, struck a pedestrian, and continued until it hit a tree. Based on the damage to the front of the car, it is estimated that the car was doing 10 kph at impact with the tree. The length of the skid marks was measured at 42 m. The road is on a downhill grade -5 percent. A test car skidded 15.5 m on the same section of rod when braked from a speed of 45 kph to a halt a.) What is the coefficient of friction between the tires and the pavement ? b.) What is the probable speed of the car involved in the accident when the brakes were applied ? c.) If the perception reaction time of the driver is 1.5 seconds, what could have been its minimum total stopping distance to avoid the crash ?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:4. A car skidded going into an intersection, struck a pedestrian, and continued until it hit a
tree. Based on the damage to the front of the car, it is estimated that the car was doing
10 kph at impact with the tree. The length of the skid marks was measured at 42 m. The
road is on a downhill grade -5 percent. A test car skidded 15.5 m on the same section of
rod when braked from a speed of 45 kph to a halt
a.) What is the coefficient of friction between the tires and the pavement ?
b.) What is the probable speed of the car involved in the accident when the brakes were
applied ?
c.) If the perception reaction time of the driver is 1.5 seconds, what could have been its
minimum total stopping distance to avoid the crash ?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
Knowledge Booster
Learn more about
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.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning