In a railroad classification yard, a 69-Mg freight car moving at 1.2 m /s at A encounters a retarder section of track at B which exerts a retarding force of 48 kN on the car in the direction opposite to motion. Over what distance x should the retarder be activated in order to limit the speed of the car to 2.9 m /s at C? 143 m A 3.9 m B (Vertical scale exaggerated)
In a railroad classification yard, a 69-Mg freight car moving at 1.2 m /s at A encounters a retarder section of track at B which exerts a retarding force of 48 kN on the car in the direction opposite to motion. Over what distance x should the retarder be activated in order to limit the speed of the car to 2.9 m /s at C? 143 m A 3.9 m B (Vertical scale exaggerated)
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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2. How much work is done by gravity as the car moves from A to C?
Answer: Ug = kN●m
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