Question 2. Balls (12 marks) EL A cricket hall has momentum (-15? - 4 j + 3k) kg In s". A player then hits the ball so that it has momentum (20E + j' + 5 k) kg m s". Find the impulse exerted by the player on the hall. (3) A tennis hall is thrown horizontally at 30 tn s" from a height of 15 m. i. Write a vector equation which gives the position of the ball as a function of time. Include the values given in your equation and indicate your coordinate syStern on a diagram of the hall's trajectory. (2) ii. Find the horizontal distance which the ball travels before hitting the ground. (3) A solid sphere rolls (without slipping} along the track shown. The sphere's speed at point A is 114. Point A is h metres higher than point B. Show that the sphere's speed at point B is: 1:3 = iggh + v} (4}