A baseball is seen to pass upward by a window 20 m above the street with a vertical speed of 15 m/s. the ball was thrown from the street. (a) what was its initial speed? m/s (b) what altitude does it

A baseball is seen to pass upward by a window 20 m above the street with a vertical speed of 15 m/s. the ball was thrown from the street. (a) what was its initial speed? m/s (b) what altitude does it reach? m (c) how long after it was thrown did it pass the window? s (d) after how many more seconds does it reach the street again? s