A 0.060 kg ball hits the ground with a speed of - 32m/s. The ball is in contact with the ground for 45 milliseconds and the ground exerts a + 55 N force on the ball. What is the magnitude of the velocity after it hits the ground?
A. 9.3m/s
B. 12m/s
C. 41m/s
D. 73m/s
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