2020 YIJC H1 Physics Prelims P2 Questions

©YIJC [Turn over YISHUN INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 1 CANDIDATE NAME CG INDEX NUMBER PHYSICS Paper 2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are required. 8867/02 2 September 2020 2 hours READ THESE INSTRUCTIONS FIRST This document consists of 18 printed pages and 2 blank pages. For Examiner’s Use Paper 2 Section A 1 /8 2 /6 3 /10 4 /9 5 /11 6 /16 Section B 7 /20 Penalty Paper 2 Total /80 Write your name and class in the spaces at the top of this page. 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 staples, paper clips, highlighters, glue or correction fluid/tape. The use of an approved scientific calculator is expected, where appropriate. Section A Answer all questions. Section B Answer one question. 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.

2 ©YIJC 8867/02/YIJC/20 [Turn over Data 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 Formulae uniformly accelerated motion s = ut + 2 1 at2 v2 = u2 + 2as resistors in series R = R1 + R2 +………. resistors in parallel R 1 ........11 21  RR =

3 ©YIJC 8867/02/YIJC/20 [Turn over Section A Answer all the questions in this section. 1 A uniform plank AB of length 5.0 m and weight 200 N is placed across a stream, as shown in Fig. 1.1. Fig. 1.1 A man of weight 880 N stands at a distance x from end A. The ground exerts a vertical force FB on the plank at end B. As the man moves along the plank, the plank is always in equilibrium. (a) (i) Draw all other forces on the plank and label them clearly. [3] (ii) Define moment of a force. …….………………………………...…………………………………………..………… …….………………………………...…………………………………………..………… ………………………………….…………………...…………………………………. [1] A

4 ©YIJC 8867/02/YIJC/20 [Turn over (iii) The man stands at a distance x = 0.50 m from end A. Calculate the magnitude of FB. FB = ………………….. N [2] (b) If the plank is not uniform and the centre of gravity is nearer to point B, explain why the magnitude of FB will increase. ………………………………...…………………………