The cue ball is moving at speed 2.4 m/s in the positive direction and hits a red ball that is at rest. After the collision the red ball starts moving in the same direction as the incoming cue ball with velocity 4.3 m/s. Find the velocity of the cue ball after the collision assuming that the mass of the red ball is 40% larger than the mass of the cue ball. Don't forget that the velocity is a vector.

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