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19. A 12 kg weight lifter's ball is thrown at 2.5 m/s to a person sitting on a resting 18.3 kg raft. If the raft

19. A 12 kg weight lifter's ball is thrown at 2.5 m/s to a person sitting on a resting 18.3 kg raft. If the raft and the person continue moving together, after the person catches the ball. what will be their velocity? (It will be a negative answer.)

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