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# A science student is riding on a flat car of a train travelling along a straight...

A science student is riding on a flat car of a train travelling along a straight horizontal track at a constant speed of 10 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 60° With the horizontal. The students teacher, who is standing on the ground nearby, observes the ball to rise vertically. How high does the ball rise?

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