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You kick a soccer ball straight upwards into the air. Your friend times the ball and...

You kick a soccer ball straight upwards into the air. Your friend times the ball and it takes a total of 3.31 seconds for the ball to go up, come down, and return to the point where you first kicked it. What was the ball's initial velocity (in m/s) immediately after the kick? (Use g = -9.8 m/s2 and round to 3 significant figures) I believe it's 16.2 m/s?? Not sure if I'm right though.

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