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A very dedicated physical therapy graduate receives her exercise ball to be used by her patients and she joyously throws the ball straight up

A very dedicated physical therapy graduate receives her exercise ball to be used by her patients and she joyously throws the ball straight up in the air. A little later the ball falls back to its height of release and she catches it. The ball was in the air a total of 4.5 seconds. What was its initial velocity upward? Neglect air friction.

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