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Two identical balls, a and b, collide and stick together. The balls, which have a mass...

Two identical balls, a and b, collide and stick together. The balls, which have a mass of 2kg eac, were initially moving towards each other. b ball A had a speed of 5m/s and ball B had a speed of 3m/s just before a collision. What is the magnitude of the change of Ball As momentum produced by the collision

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