Two balls collide head-on on a table. The first ball has a mass of 0.50 kg and an initial velocity of 12.0 m/s. The second ball has a mass of 0.75 kg and an initial velocity of - 16.0 m/s. After the collision, the first ball travels at a velocity of - 21.6 m/s. What is the velocity of the second ball after the collision? Assume a perfectly elastic collision and no friction between the balls and the table.
A. 6.4 m/s
B. 11.3 m/s
C. 17.8 m/s
D. 21.6 m/s
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