A railroad car of mass M moving at a speed v 1 collides and couples with twocoupled railroad cars, each of the same mass M and movingin the same direction at a speed v 2. (a) What is the speed vf ofthe three coupled cars after the collision in terms of v 1 and v 2?(b) How much kinetic energy is lost in the collision? Answerin terms of M, v 1, and v 2.

Answered: A railroad car of mass M moving at a…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter8: Momentum And Collisions

Section: Chapter Questions

Problem 3OQ

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A railroad car of mass M moving at a speed v₁ collides and couples with two
coupled railroad cars, each of the same mass M and moving
in the same direction at a speed v ₂. (a) What is the speed vf of
the three coupled cars after the collision in terms of v₁ and v ₂?
(b) How much kinetic energy is lost in the collision? Answer
in terms of M, v ₁, and v₂.

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