1. Jacky is hitting a tennis ball with a racket. material X re o (a) State two effects on the motion of tennis ball by the force. (2 marks) (b) A pair of action and reaction is involved when the ball is hit by the racket. (i) Draw in the figure above to show this pair of forces. (2 marks) (i) State clearly this pair of forces. (2 marks) (iii) Compare the direction and size of the forces in (ii). (2 marks)YING WA COLLEGE WORKSHEET 11 S.2 INTEGRATED SCIENCE FORCE AND MOTION (ii) Draw the free-body diagram of Nicole at time = 15 s. (2 marks) (c) (i) How high has the lift reached at time = 7.5 s? (1 mark) (ii) Are forces acting on Nicole balanced or unbalanced at time = 7.5 s? Explain briefly. (2 marks)