A person standing on a building ledge throws a ball vertically from a launch position (45 mathrm{~m})

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A person standing on a building ledge throws a ball vertically from a launch position \(45 \mathrm{~m}\) above the ground. If it takes \(2.0 \mathrm{~s}\) for the ball to hit the ground, \((a)\) with what initial speed was the ball thrown and \((b)\) in which direction was it thrown? 

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