Bowen Prelim P2

1 [Turn over Class Full Name Index Number Preliminary Examination 2024 I believe, therefore I am PHYSICS Secondary 4 Express Paper 2 Structured and Free Response 22 August 2024 1 hour 45 minutes Candidates answer on Question Paper. No additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name and index number on all 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 question. Write your answers in the spaces provided. Indicate your choice in the table provided below. For Examiner’s Use Section A Section B Total 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 6091/02 70 10 80 This document consists of 24 printed pages, including the cover page.

2 [Turn over Section A Answer all questions. 1 (a) Define velocity. …………………………………………………………………………………….. [1] (b) A 7.5 kg rock is thrown vertically upwards from the surface of a planet. The rock leaves the surface of the planet with a speed of 4.0 m s–1 at time t = 0. Fig. 1.1 shows the velocity-against time graph of the rock. Fig. 1.1 Assume that the planet does not have an atmosphere and that the resistive force acting on the rock is negligible. (i) Using the graph, determine the weight of the rock on the planet. weight = …………………. [3] For Examiner’s Use

3 [Turn over (ii) Calculate the maximum height the rock reached before it starts falling. maximum height = …………………… [1] (iii) The same rock was thrown vertically upwards on Earth with a speed of 4.0 m s -1. Assuming resistive forces are also negligible on Earth and acceleration due to gravity is 10 m/s2, draw the velocity against time graph of the rock and label it E on Fig. 1.1. [2] [Total: 7] For Examiner’s Use 2 A very deep tank is used when training sailors to escape from submarines. The tank is cylindrical and open to the air at the top. Fig. 2.1 shows the tank. Fig. 2.1 (not to scale) The area of the base of the tank is 4.2 x 105 cm