Freight car A with a gross weight of 138000 lb is moving along the horizontal track in a switching yard at 3.0 mi/hr. Freight car B with a gross weight of 166000 lb and moving at 3.9 mi/hr overtakes car A and is coupled to it. Determine (a) the common velocity V of the two cars as they move together after being coupled and (b) the loss of energy |AE| due to the impact. 3.9 mi/hr Answers: (a) V= (b) AEL: B i ; 3.0 mi/hr A mi/hr ft-lh

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Freight car A with a gross weight of 138000 lb is moving along the horizontal track in a switching yard at 3.0 mi/hr. Freight car B with a
gross weight of 166000 lb and moving at 3.9 mi/hr overtakes car A and is coupled to it. Determine (a) the common velocity V of the two
cars as they move together after being coupled and (b) the loss of energy |AE| due to the impact.
3.9 mi/hr
Answers:
(a) V =
B
i
(b) |AE| = i
3.0 mi/hr
mi/hr
ft-lb
Transcribed Image Text:Freight car A with a gross weight of 138000 lb is moving along the horizontal track in a switching yard at 3.0 mi/hr. Freight car B with a gross weight of 166000 lb and moving at 3.9 mi/hr overtakes car A and is coupled to it. Determine (a) the common velocity V of the two cars as they move together after being coupled and (b) the loss of energy |AE| due to the impact. 3.9 mi/hr Answers: (a) V = B i (b) |AE| = i 3.0 mi/hr mi/hr ft-lb
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