2023 TPSS Phy Prelims P2

This document consists of 20 printed pages. © TPSS/6091/02/2023/SEC4/PRELIM TAMPINES SECONDARY SCHOOL Secondary Four Express PRELIMINARY EXAMINATION 2023 NAME CLASS REGISTER NUMBER PHYSICS 6091/02 Paper 2 Theory 21 Aug 2023 1 hour 45 minutes Candidates answer on the Question Paper No Additional Materials are required READ THESE INSTRUCTIONS FIRST Write your name, class and register number on all the work you hand in. Write in 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. Section B Answer all questions. Question 12 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. The number of marks is given in brackets [ ] at the end of each question or part question. O For Examiner’s Use SECTION A (50 marks) SECTION B (30 marks) significant figure units TOTAL (80 marks)

2 Section A Answer all questions in the spaces provided. 1 Fig. 1.1 shows the velocity-time graph of a car. It was initially travelling to the left. Fig. 1.1 (a) (i) State how acceleration of the car can be found from a velocity-time graph. …...………………………………………………………………………………………..... [1] (ii) Determine the acceleration of the car in the first 4 min. Leave your answer in S.I. units. acceleration = ……………………… [2] (b) State what the shaded area on Fig. 1.1 represents. ..………………………………………………………………………………………………..... [1] (c) State the time when the car changed direction. ..………………………………………………………………………………………………..... [1] velocity m/s t / min 2 - 2 - 4 0 1 2 5 643 87

3 (d) Calculate the displacement of the car after 8 min and state the direction of the displacement. displacement = ……………………… [2] direction = ……………………… [1] 2 Fig. 2.1 shows two blocks, initially at rest, being pushed by force F from the left along a rough surface. The mass of block A is 3.0 kg while the mass of block B is 15 kg. As the blocks are pushed, they accelerate at a constant rate of 2.0 m/s2. The frictional force acting on block A is 1.8 N and the frictional force acting on B is 9.0 N. Fig. 2.1 (a) Determine the magnitude of the force F. magnitude = ……………………… [2] (b) By considering the forces acting on block B, determine the magnitude of the contact force between blocks A and B. F A B rough surface

4 magnitude = ……………………… [2] 3 In Fig. 3.1, Papa Lim and Crystal stood on a uniform board. The board weighs 40 N and the support is under the centre of gravity of the board. Papa Lim and Crystal weigh 810 N and 400 N respectively. Papa Lim is standing 0.80 m from the support. Fig. 3.1 (a) Explain what is meant by “… centre of gravity of the