posted by Mattie .
A football is thrown with an initial upward velocity component of 15.0 m/s and a horizontal velocity component of 18.0 m/s
The time required for the football to reach the highest point in its trajectory is 1.53s.
It gets 11.5m above the ground.
How much time after it is thrown does it take to return to its original height?
How far has the football traveled horizontally from its original position?