A football player is preparing to punt the ball down the field. He drops the ball from rest and it falls vertically 1.0 m down onto his foot. After he kicks it, the ball leaves the foot with a speed of 18.5 m/s at an angle 57° above the horizontal.
What is the magnitude of the impulse delivered to the ball in kilogram meters per second after he kicks it? An American football has a mass of 425 g.