Answered: an intersection with speed 45 mph. The…

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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A car is approaching toward an intersection with speed 45 mph. The road has a downhill grade of 1%. When the car is at a distance of 250 ft from the intersection, the signal turned yellow. If the driver applies brake and the reaction time of the driver is 1.5 s, will the driver be able to come to a complete stop? Justify your answer with calculations. Assume braking friction coefficient of 0.35.

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$U \sin g r e l a t i o n f o r s t o p p i n g d i s \tan c e S S D = v t + \frac{v^{2}}{2 g (f \pm G)} v = 45 m p h = 66 \frac{f t}{s} G = - 1 % = - 0.01$

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