Question: A baseball seen the past upward by window with a vertical speed of 16 m/s. If the ball is thrown by a person, 21 m

A baseball seen the past upward by window with a vertical speed of 16 m/s. If the ball is thrown by a person, 21 m below the street, (a) what was its initial speed, (b) what altitude does it reach, (c) when was it thrown, and (d) when does it reach the street again?

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