Momentum: Mechanics. Ex 7A. Question #11 Watch

alevelmath1
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Particle A of mass 5kg is moving at a speed of 2 m/s when it hits a stationary particle,B, of mass 2kg.After the impact,Particle A has speed 0 m/s and particle B has speed v m/s . The loss in momentum for particle A equals the gain in momentum for particle B. Find the value of v .

My answer is 5 m/s but the book answer is 1.2 m/s.

Please clarify the confusion.
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dextrous63
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If this is a direct collision, you are correct. If you can post a piccie of the question, it might help in case you have missed something in your own description.
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alevelmath1
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dextrous63
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Yep. The book is wrong.
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alevelmath1
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Thanks my dear !
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