Alex throws a 0.15-kg rubber ball down onto the floor. The ball's speed just before impact is 4.5 m/s, and just after is 2.5 m/s. If the ball is in contact with the floor for 0.025 s, what is the magnitude of the average force applied by the floor on the ball? Choose A. 3.5 N B. 48 N C. 42 N D. 54 N

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