A player bounces a 0.38-kg soccer ball off her head, changing the velocity of the ball from varrowboldi = (10.0 m/s)xhatbold + (-2.4 m/s)yhatbold to varrowboldf = (4.1 m/s)xhatbold + (4.9 m/s)yhatbold. The ball is in contact with the player's head for 6.7 ms.
(a) What is the direction of the impulse delivered to the ball? (counterclockwise from the positive x axis)
(b) What is the magnitude of the impulse delivered to the ball?