SJI_2020 Year 3 EOY Physics 6091 P2

Section A 1 2 3 4 5 6 7 8 Section B 9 10 11 For Examiner’s Use Sect. A / 40 Sect. B / 30 Total / 70 ST JOSEPH’S INSTITUTION END-OF-YEAR EXAMINATION 2020 (YEAR 3) CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 2 Additional Materials: Nil 6091/02 5 OCTOBER 2020 1 hour 40 minutes (08:00 – 09:40) READ THESE INSTRUCTIONS FIRST Write your name, class and index number on the cover page of this Question Paper and all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A and B Answer all questions on the Question paper. Candidates are reminded that all quantitative answers should include appropriate units. Candidates are advised to show formulae and 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. This document consists of 18 printed pages including this cover page

2 width : 0.594 m length : 0.841m A1 size Section A (40 marks) Answer all questions in this section. 1 In a prac tical session, a student is required to measure the thickness of a piece of graph paper. Fig. 1.1 shows the reading of the micrometer used to measure 100 pieces of graph papers. Fig. 1.1 (a) Determine the thickness of one piece of graph paper in metre and in standard form. thickness = ……………………….. [2] (b) The term GSM (grams per square meter) is a measure of the mass of various types of paper from a sample sheet cut to one square meter. The heavier the paper, the higher the GSM. The student bought a piece of A1 size cardboard rated at 400 GSM as shown in Fig. 1.2. Fig. 1.2

3 (i) Calculate the volume of the cardboard in m 3, given that it has a thickness of 0.22 mm. volume = ……………………….. [2] (ii) Using the GSM of the paper, calculate the mass, and hence the density of the A1 sized cardboard in kg/m3. density = ……………………….. [2]

4 2 In a bungee jump, a fixed rubber cord is fastened to the jumper’s ankles to stop his fall. Fig. 2.1 shows how the velocity of the bungee jumper changes during the first 6.0 s after he made the jump off a cliff. Fig. 2.1 (a) Calculate the acceleration of the jumper between t = 1.0 and 3.0 s. acceleration = ……………………….. [1] (b) Describe how the motion of the jumper changes between t = 3.0 s and 6.0 s. ……………………………………………………………………………………………... ……………………………………………………………………………………………... ………………