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Q. Ball A has a mass of 0.90 kg and moves with an initial speed of 10.60 m/s. It collides with stationary balls B and C, whose centers are on a line vertical to the initial velocity of ball A and that are initially in contact with one-another. Balls B and C are identical and have a mass of 0.60 kg. After the collision, balls B and C have the similar speed, 3.20m/s, other than ball B moves at an angle of 26 above the horizontal and ball C moves at an angle of 26 below the horizontal. What is the velocity of ball A after the collision? (Reply in units of m/s.)

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