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2. (50) One billiard ball with a mass of 1.20 kg is moving south with a speed of 4.00m. A second billiard ball with a mass of 0.80 kg is moving north with a speed of 5.00m. The balls have a glancing collision, which lasts for 6.0 ms. As a result of the collision, the first ball is deflected by 90 sending it east with a speed of 3.00m (a) What is the velocity of the second ball after the collision? Express your answer in unit-vector notation. (b) Was is the magnitude and direction of the average net force on Ball 2 during the collision? Be specific about which direction the angle is relative to. If no reference is given, it will be assumed the angle is measured relative to the east and that positive angles are counter-clockwise. please do part a and b, thank you.
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