Question 2. Balls (12 marks} a. A cricket ball has momentum {-ISI - 4 j + 3k) kg m s". A player then hits the ball so that it has momentum (20E + fij + 5 E) kg m s". Find the impulse exerted by the player on the ball. (3] b. A tennis ball is thrown horizontally at 30 m s" from a height of 15 m. i. Write a vector equation which gives the position of the ball as a inetion of time. Include the values given in your equation and indicate your coordinate system on a diagram of the hall's trajectory. (2) ii. Find the horizontal distance which the hall travels before hitting the ground- (3) c. A solid sphere rolls (without slipping) along the track shown. The sphere's speed at point A is 19A. Point A is I: metres higher than point B. Show that the sphere's speed at point B is: v3 = '%gh + \"of (4}