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A rubber ball (m = 0.25 kg) is dropped from a height of 1.5 m onto the floor. Just after bouncing from the floor, the ball has a speed of 4.0 m/s. (a) What are the magnitude and direction of the impulse imparted by the floor to the ball? (b) If the average force of the floor on the ball is 18 N, how long is the ball in contact with the floor? Ignore the force of gravity during the collision of the ball with the floor.

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