PLMGSS Prelim 2024 4E Physics P2 QP + Ans

1 CANDIDATE NAME CLASS CLASS INDEX NUMBER CENTRE NUMBER INDEX NUMBER PHYSICS 6091/02 Paper 2 Structured and Free Response 20 August 2024 1 hour 45 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your class, index number and name on all the work you hand in. Write in dark blue or black pen. You may use an 2B pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions. Write your answers in the spaces provided. Section B Answer one question. Write your answers in the spaces provided. 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 their working in a clear and orderly manner, as more marks are awarded for the sound use of Physics than for correct answers. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 27 printed pages. For Examiner’s Use Section A / 70 Section B Qn _____ / 10 Total / 80 Paya Lebar Methodist Girls’ School (Secondary) Preliminary Examination 2024 Secondary 4 Express / G3

2 Section A (70 marks) Answer all questions. 1 Fig. 1.1 shows a satellite moving at a constant speed in a circular orbit around the Earth. Fig. 1.1 Speed is a scalar quantity but velocity is a vector quantity. (a) State how a scalar quantity differs from a vector quantity. ……………………………………………………………………………………. ………………………………………………………………………….……... [1] (b) Underline every vector quantity in the list below. distance displacement force length mass time [1] (c) There is a resultant force acting on the satellite in Fig. 1.1. This force acts in the radial direction toward the centre of the Earth. Explain if there is work done by the resultant force on the satellite after it travels one complete revolution. …………………………………………………………………………………… …………………………………………………………………………………… ………………………………………………………………………..…..…… [1]

3 [Turn Over 2 Fig. 2.1 is the distance–time graph for a stone that is dropped from rest at t = 0 at the surface of a lake. It starts to sink thereafter and eventually reaches terminal velocity. Fig. 2.1 (a) Using Fig. 2.1 and appropriate working, determine the terminal velocity of the stone. terminal velocity = ……………….. [2] (b) Describe how the resistive force due to water changes as the stone descends between t = 3 and t = 5 s. ………………………………………………………………………………… ……………………………………….…………………………………..… [1] (c) Acceleration of the stone decreases between t = 3 and t = 5 s. By consi