While travelling at a constant speed a driver saw a road block 112 m away. He applied the brakes and the car decelerated uniformly at 6.4 m/s^2. It stopped 5 m from the block. Find the initial constant speed of the vehicles in kph, if the drivers perception reaction is 2.2 second

Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter3: Characteristics Of The Driver, The Pedestrian, The Bicyclist, The Vehicle, and The Road
Section: Chapter Questions
Problem 10P
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While travelling at a constant speed a driver saw a road block 112 m away. He applied the brakes and the car decelerated uniformly at 6.4 m/s^2. It stopped 5 m from the block. Find the initial constant speed of the vehicles in kph, if the drivers perception reaction is 2.2 second 

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