Freight car A with a gross weight of 159000 lb is moving along the horizontal track in a switching yard at 2.2 mi/hr. Freight car B with a gross weight of 137000 Ib and moving at 3.3 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. 3.3 mi/hr 2.2 mi/hr B Answers: (a) V = i mi/hr ( b) |ΔΕΙ- i ft-lb

Freight car A with a gross weight of 159000 lb is moving along the horizontal track in a switching yard at 2.2 mi/hr. Freight car B with a gross weight of 137000 Ib and moving at 3.3 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. 3.3 mi/hr 2.2 mi/hr B Answers: (a) V = i mi/hr ( b) |ΔΕΙ- i ft-lb

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter6: Momentum And Collisions

Section: Chapter Questions

Problem 10WUE

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Question

Freight car A with a gross weight of 159000 Ib is moving along the horizontal track in a switching
yard at 2.2 mi/hr. Freight car B with a gross weight of 137000 Ib and moving at 3.3 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.
3.3 mi/hr
2.2 mi/hr
B
A
Answers:
(a) V =
i
mi/hr
(b) ΙΔΕΙ -
i
ft-lb

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Freight car A with a gross weight of 152000 Ib is moving along the horizontal track in a switching yard at 2.0 mi/hr. Freight car B with a gross weight of 162000 Ib and moving at 2.6 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. 2.6 mi/hr 2.0 mi/hr A. Answers: (a) V = mi/hr ( b) |ΔΕΙ- i ft-lb
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