Whitley Prelim P2

This document consists of 20 printed pages. Name: ( ) Class: WHITLEY SECONDARY SCHOOL A Caring and Learning Community of Leaders Perseverance * Respect * Integrity * Discipline *Empathy PRELIMINARY EXAMINATION 2024 READ THESE INSTRUCTIONS FIRST Write your index number and name on all the work you hand in. Write in dark blue or black ink on both sides of the paper. 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. Section B Answer all questions. Question 13 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 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. SUBJECT : Physics (6091) Paper 2 LEVEL : Sec 4 G3 DATE : 23 Aug 2024 DURATION : 1 hour 45 min SETTER : Mr Ng Mun Leong VETTER : Ms Kuah Li Wen

2 Section A Answer all the questions in this section. 1 A student measures the mass and the volume of four samples of rock P, Q, R and S. The results are shown in Fig. 1.1. P Q R S mass / g 202 101 4508 448 volume / cm3 44 22 978 80 Fig. 1.1 (a) (i) Describe in detail how a measuring cylinder is used to find the volume of rock Q. ………………………………………………………………………………… ………………………………………………………………………………… ………………………………………………………………………………… ...…………………………………………………………………………… [2] (ii) Suggest why the volume of rock R cannot be found with an ordinary laboratory measuring cylinder. ………………………………………………………………………………… ...…………………………………………………………………………… [1] (b) Three of the rocks are made from the same material. State and explain which rock is made from a different material. …………………………………………………………………………………………. ……………………………………………………………………………………… [1]

3 2 Fig. 2.1 shows a man pushing a heavy box with a constant force X. A frictional force f acts in horizontal direction. Fig. 2.1 (a) The forces on the box are balanced and the box is stationary. (i) State what is meant by balanced forces. ………………………………………………………………………..…… [1] (ii) The frictional force in Fig. 2.1 does not produce any heating effect. State what must happen for the frictional force to produce heating. ………………………………………………………………………..…… [1] (iii) Apart from being stationary, describe one other possible state of motion of the box when the forces are balanced. ………………………………………………………………………..…… [1] (b) When X = 100 N