A body of mass 2.0 kg makes an elastic collision with another body at rest and continues

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A body of mass 2.0 kg makes an elastic collision with another body at rest and continues to move in the original direction but with one-fourth of its original speed.

(a) What is the mass of the other body?

(b) What is the speed of the two-body center of mass if the initial speed of the 2.0 kg body was 4.0 m/s?

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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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