2024 ACSBR Physics Prelim P2

Name: Class: Index No.: Anglo-Chinese School (Barker Road) PRELIMINARY EXAMINATION 2024 SECONDARY FOUR EXPRESS PHYSICS 6091 PAPER 2 TIME: 1 HOUR 45 MINUTES READ THESE INSTRUCTIONS FIRST Write your name, class & index number in the box provided at the top of this page. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. Do not use glue or correction fluid. Section A Answer all questions. Section B Answer one question only. Question 15 has a choice of parts to answer. Candidates are reminded that all quantitative answers should include appropriate units. The use of an approved scientific calculator is expected, where appropriate. Candidates are advised to show all their working in a clear and orderly manner, as more marks are awarded for the sound use of Physics than correct answers. The number of marks is given in brackets [ ] at the end of each question or part question. This question paper consists of 24 printed pages. For Examiner’s Use Section A / 70 Section B / 10 Total / 80

Anglo-Chinese School (Barker Road) Preliminary Examination 2024 2 Secondary 4 Express Physics 6091/2 SECTION A (70 marks) Answer all the questions in this section. 1 Fig. 1.1 is the speed-time graph for a rocket from the moment that the fuel starts to burn at time t = 0. Fig. 1.1 (a) State the magnitude of the acceleration of the rocket at t = 0. acceleration = ……………………….. [1] (b) Describe the motion of the rocket between t = 5 s and t = 80 s. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. [2] (c) Calculate the acceleration of the rocket at t = 90 s. acceleration = ……………………….. [2]

Anglo-Chinese School (Barker Road) Preliminary Examination 2024 3 Secondary 4 Express Physics 6091/2 2 A rock climber, of total weight 620 N, holds herself in equilibrium against a vertical cliff. She pulls on a rope that is fixed at the top of the cliff and presses her feet against the cliff. Fig. 2.1 shows her position. Fig. 2.1 The climber’s centre of gravity is 0.90 m from the cliff. (a) Calculate the moment due to her weight about her feet. moment = …………………….. [1] (b) The rope