YSS 2024 4E Phy Prelim P2 with MS

[Turn over YISHUN SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 SECONDARY 4 EXPRESS CANDIDATE NAME CLASS INDEX NUMBER PHYSICS 6091/02 Paper 2 19 August 2024 1 hour 45 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name, class and index number on the work you hand in. Write in dark blue or black pen. You may use an HB 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 the 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 all their working in a clear and orderly manner, as more marks are awarded for 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.

2 This document consists of 23 printed pages.

3 [Turn over Section A Answer all questions. 1 Fig. 1.1 shows an object hanging from the ceiling. The object has a weight of 20 N and it is pulled by a force of 16 N. The figure is not drawn to scale. Fig. 1.1 Using a scale of 1.0 cm : 2.0 N, draw a labelled vector diagram to determine the magnitude of the tension T, in the string. magnitude of tension T = .............................. [3] [total: 3] T 16 N 45

4 2 Fig. 2.1 shows the velocity -time graphs of an object falling in vacuum and in air. The object is dropped from the same height. Fig. 2.1 (a) Define velocity. ………………………………………………………….……………………………………………… ………………..…………………………………….……………………………………………… [1] (b) Calculate the displacement of the falling object in vacuum from t = 1.0 s to t = 1.5 s. displacement = ………………………… [2] (c) The two graphs have different shapes. graph P – in vacuum graph Q - in air velocity m/s time / s 35 30 25 20 15 10 5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 graph P graph Q

5 [Turn over (i) Describe the acceleration of the object when it is falling in air. ……………………………………………………………………………………….……….. [1] (ii) Explain, using forces acting on the object, the motion of the object you described in (i). ……………………………………………...……………………………………….…………… ……….......................................