Question: 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})

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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