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A baseball is seen to pass upward by a window with a vertical speed of 14m/s . The ball was thrown by a person 14m below on the street .
A ) what was its initial speed ?
B ) what altitude does it reach?
C ) what time elapsed since it was thrown?
D ) what time will take the baseball to reach ground again , counting from the moment it passed the window upward ?

Sagot :

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