A 40-kg skater moving at 4 m/s overtakes a 60-kg skater moving at 2 m/s in the

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A 40-kg skater moving at 4 m/s overtakes a 60-kg skater moving at 2 m/s in the same direction and collides with her. The two skaters stick together. 

(a) What is their final speed? 

(b) How much kinetic energy is lost? 

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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