ADSS Prelim P2

This question paper consists of 26 printed pages including this cover page. ADMIRALTY SECONDARY SCHOOL SUBJECT : Physics CODE/PAPER : 6091/2 LEVEL/STREAM : Secondary 4 Express DATE : 22 Aug 2024 TIME : 0800h – 0945h DURATION : 1 hour 45 minutes READ THESE INSTRUCTIONS FIRST Write your name, class and register number on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams, graphs, tables or rough working. 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 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. DO NOT TURN OVER THIS PAPER UNTIL YOU ARE TOLD TO DO SO. PRELIMINARY EXAMINATION 2024 For Examiner’s Use Section A / 70 Section B / 10 Total / 80 NAME: NO: CLASS:

2 Section A Answer all questions. 1 Fig. 1.1 shows the speed-time graph for a rocket from the moment the fuel starts to burn at t = 0 s. Fig. 1.1 (a) Describe the motion of the rocket between t = 5 s and t = 100 s. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… [3] (b) The total mass of the rocket at t = 80 s is 1.6 x 106 kg. Calculate the upward force on the rocket due to the burning fuel at this time. upward force = ………………………………..… [2] 1400 1200 1000 800 600 400 200 0 0 20 40 60 80 100 t / s speed m/s

3 2 A swing is made by connecting a car tyre to the wire using a rope and a hook. The wire hangs between two fixed points, as shown in Fig. 2.1. Fig. 2.1 The tyre is hanging in equilibrium with the wire hanging at an angle of 17 to the horizontal. The tension in the wire is 150 N. Assume that the rope and hook have negligible weight. (a) In the space provided, draw a labelled diagram to show the resultant of the two tensions. Determine the size of the resultant force and the direction between the resultant force and the horizontal. scale = ……………………………….. resultant force = ….………………..…… direction = ………………………………... [4] fixed point fixed point hook wire 150 N 150 N 17o 17o tyre rope

4 (b) State and explain the weight of the tyre. …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… [2]