EJC Physics 2020 J2 H1 JCT P2 QP

©EJC 2020 8867/02/J2H1MYE/2020 [Turn over EUNOIA JUNIOR COLLEGE JC2 JC2 Mid-Year Examination 2020 General Certificate of Education Advanced Level Higher 1 CANDIDATE NAME CIVICS GROUP 1 9 - REGISTRATION NUMBER PHYSICS Paper 2 Structured Questions 8867/02 June/July 2020 2 hours Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name, civics group and registration number on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams or graphs. Do not use paper clips, highlighters, glue or correction fluid. The use of an approved scientific calculator is expected where appropriate. Section A Answer all questions. Section B Answer one question only. 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 23 printed pages and 1 blank page. For Examiner’s Use Section A 1 8 2 9 3 10 4 8 5 10 6 15 Section B 7 8 20 Total 80

2 ©EJC 2020 8867/02/J2H1MYE/2020 Data Formulae uniformly accelerated motion, s = ut + ½at2 v2 = u2 + 2as resistors in series, R = R1 + R2 + … resistors in parallel, 1/R = 1/R1 + 1/R2 + … speed of light in free space, c = 3.00 × 10 8 m s–1 elementary charge, e = 1.60 × 10–19 C unified atomic mass constant, u = 1.66 × 10–27 kg rest mass of electron, me = 9.11 × 10–31 kg rest mass of proton, mp = 1.67 × 10–27 kg the Avogadro constant, NA = 6.02 × 1023 mol–1 gravitational constant, G = 6.67 × 10–11 N m2 kg–2 acceleration of free fall, g = 9.81 m s–2

3 ©EJC 2020 8867/02/J2H1MYE/2020 [Turn over Section A Answer all the questions in this section in the spaces provided. 1 An aeroplane is flying horizontally at a steady speed of v = 67 m s-1 as shown in Fig. 1.1. A parachutist jumps off the aeroplane and free falls for 80 m before releasing the parachute. Air resistance is negligible before the parachute opens. (a) Deduce the magnitude and direction of the velocity of the parachutist just before the parachute is released. direction of velocity = …………………………………. magnitude of velocity = ………………………. m s-1 [3]

4 ©EJC 2020 8867/02/J2H1MYE/2020 (b) In Fig. 1.1, sketch a possible path representing the parachutist’s trajectory (i) labelled P, and (ii) labelled Q if the effects of air resistance cannot be ignored. [1] (c) Some time after the parachute is released, the parachutist of mass 82 kg reaches a terminal velocity of magnitude 7.0 m s-1 with direction vertically downwards normal to the ground. (i) State the condition that allowed the parachutist to fall at terminal velocity. …………………………………………………………………………………………………