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Engineering and Tech / Vector Mechanics for Engineers: Dynamics 10 / Chapter 13 / Problem 13.129

Vector Mechanics for Engineers: Dynamics | 10th Edition | ISBN: 9780073398136 | Authors: Ferdinand P. Beer

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Answer: The subway train shown is traveling at a speed of

Chapter 13, Problem 13.129

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QUESTION:

The subway train shown is traveling at a speed of 30 mi/h when the brakes are fully applied on the wheels of cars B and C, causing them to slide on the track, but are not applied on the wheels of car A. Knowing that the coefficient of kinetic friction is 0.35 between the wheels and the track, determine (a) the time required to bring the train to a stop, (b) the force in each coupling.

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QUESTION:

The subway train shown is traveling at a speed of 30 mi/h when the brakes are fully applied on the wheels of cars B and C, causing them to slide on the track, but are not applied on the wheels of car A. Knowing that the coefficient of kinetic friction is 0.35 between the wheels and the track, determine (a) the time required to bring the train to a stop, (b) the force in each coupling.

ANSWER:

Problem 13.129

The subway train shown is traveling at a speed of 30 mi/h when the brakes are fully applied on the wheels of cars B and C, causing them to slide on the track, but are not applied on the wheels of car A. Knowing that the coefficient of kinetic friction is 0.35 between the wheels and the track, determine (a) the time required to bring the train to a stop, (b) the force in each coupling.

Step by Step Solution

Step 1 of 7

Given data:

Speed

Coefficient of kinetic friction

Free body diagram of the train

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