Two coupled boxcars are rolling along at 2.5 m/s when they collide with and couple to a third, stationary boxcar.a. What is the final speed of the three coupled boxcars?b. What fraction of the cars’ initial kinetic energy is transformed into thermal energy?

Two coupled boxcars are rolling along at 2.5 m/s when they collide with and couple to a third, stationary boxcar.a. What is the final speed of the three coupled boxcars?b. What fraction of the cars’ initial kinetic energy is transformed into thermal energy?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter13: Rotation Ii: A Conservation Approach

Section: Chapter Questions

Problem 2PQ

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Question

Two coupled boxcars are rolling along at 2.5 m/s when they collide with and couple to a third, stationary boxcar.
a. What is the final speed of the three coupled boxcars?
b. What fraction of the cars’ initial kinetic energy is transformed into thermal energy?

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