A vehicle moving at 54 kmph speed was stopped by applying new technology brake and the length of skid mark was 20 m. If the average skid resistance of the pavement surface is known to be 0.6, then the brake efficiency of the vehicle is %.

A vehicle moving at 54 kmph speed was stopped by applying new technology brake and the length of skid mark was 20 m. If the average skid resistance of the pavement surface is known to be 0.6, then the brake efficiency of the vehicle is %.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

A vehicle moving at 54 kmph speed was stopped
by applying new technology brake and the length
of skid mark was 20 m. If the average skid
resistance of the pavement surface is known to be
0.6, then the brake efficiency of the vehicle is
%.

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• Question 1 Hennessey Venom F5, one of the world's fastest car today is able to reach top speed at 480 kph during a test drive. If the coefficient of friction on the straight horizontal race track is 0.6, at what distance from the stopping point did he applied his brakes? Question 2 Calculate the modulus of elasticity of the subgrade in MPa, if the modulus of elasticity of the pavement is 2900 MPa and the stiffness factor is 0.549.