Easy# Soccer Balls as Projectiles: Horizontal Velocity

APPH12-QYVDYR

After soccer practice, Coach Miller goes to the roof of the school to retrieve the errant soccer balls. The height of the school is $3.5\ \text{m}$. He kicks a soccer ball which leaves the roof with a horizontal velocity of $15\ \text{m/s}$.

Ignoring air resistance, what is the horizontal velocity of the ball just before it lands on the ground?