EJC Physics 2021 J2 H1 MYE P2 (Printed)

©EJC 2021 8867/02/J2H1MYE/2021 [Turn over EUNOIA JUNIOR COLLEGE JC2 Mid-Year Examination 2021 General Certificate of Education Advanced Level Higher 1 CANDIDATE NAME CIVICS GROUP 2 0 - REGISTRATION NUMBER PHYSICS Paper 2 Longer Structured Questions 8867/02 02 July 2021 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 You are advised to spend one and a half hours on Section A and half an hour on Section B 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 2 3 4 5 6 Section B 7 8 Total

2 ©EJC 2021 8867/02/J2H1MYE/2021 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 × 108 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 2021 8867/02/J2H1MYE/2021 [Turn over Section A Answer all the questions in this Section in the spaces provided. 1 (a) Define acceleration. ………………………………………………………………………………………………………… …………………….…………..……………………………………………………………………[1] (b) The displacement s moved by an object in time t may be given by the expression 212s ut at= + where a is the acceleration of the object. State one condition for this expression to apply to the motion of the object. ……………………………………………………….……………………………………………..[1] (c) A rock rolls down the slope of a cliff, inclined at 20 o, and leaves the cliff at a speed of 50 m s−1 as shown in Fig 1.1. The rock lands onto another cliff that is at a horizontal distance of 25 m away from the first one. Fig. 1.1 (i) Calculate the duration of time that the rock experiences free fall. time = ……………………… s [2]

4 ©EJC 2021 8867/02/J2H1MYE/2021 (ii) Determine the angle, below the horizontal, of the direction of the rock’s velocity upon landing. angle = ……………………………… o [3] (iii) A brid