Answer: A body of mass 2.0 kg makes an elastic collision
Chapter , Problem 65(choose chapter or problem)
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 mls?
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