PROBLEM 4: 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 distance required to bring the train to a stop, (b) the force in each coupling. 40 tons 50 tons 40 tons 30 A B C

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter6: Applications Of Newton's Laws
Section: Chapter Questions
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Solve the following problem (NOTE: Use any reasonable DATA not given in the problem.)
PROBLEM 4:
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 distance
required to bring the train to a stop, (b) the force in each
coupling.
40 tons
50 tons
40 tons
30 mi/h
A
B
C
Transcribed Image Text:PROBLEM 4: 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 distance required to bring the train to a stop, (b) the force in each coupling. 40 tons 50 tons 40 tons 30 mi/h A B C
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