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)YING WA COLLEGE WORKSHEET 11 S.2 INTEGRATED SCIENCE FORCE AND MOTION 2. Nicole is taking a lift. The lift starts to rise from the ground floor at time = 0. The distance-time graph of the lift from time = 0 to 15 s is shown below. She is standing still in the lift in this whole period of time. distance (m) 50 40 30 20 - 10 time (s) 10 15 (a) Describe the motion of the lift from time = 0 to 10 s. (3 marks) (b) (i) State one contact force and one non-contact force acting on Nicole. (2 marks) N