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Ball A with a mass of 2.0 kilograms is traveling at 6.5 m/s strikes Ball B...

Ball A with a mass of 2.0 kilograms is traveling at 6.5 m/s strikes Ball B with a mass 4.0 kilograms which is at rest. After the collision, Ball A moves away at an angle of 40.0 degrees above the x-axis and Ball B moves away at an angle of -20.0 degrees below the x-axis. What are the final velocities of each ball?  

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