NJC 2022 SH1 H2 Physics Promo Paper 1 Final

[Turn over NATIONAL JUNIOR COLLEGE SENIOR HIGH 1 COMMON TEST Higher 2 CANDIDATE NAME SUBJECT CLASS REGISTRATION NUMBER PHYSICS Paper 1 Multiple Choice Candidate answers on the Question Paper. No Additional Materials are required. 9749/01 30 September 2022 1 hour READ THESE INSTRUCTION FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, subject class and registration number on the Answer Sheet in the spaces provided unless this has been done for you. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct ans wer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. This document contains 16 printed pages. OAS index number is in 5-digit format. 5 digit format: 2nd digit and the last four digits of the Reg Number. e.g. 0905648 = 95648.

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4 1 Which vector diagram shows the resultant of the vector subtraction P − Q? A B C D 2 With regards to precision and accuracy, which of the following statements is true? A A set of results with poor precision could be made more precise by removing the zero error. B A set of results with poor accuracy could be made more accurate by taking the average of several readings. C A set of results with good precision suggests that the mean value of the experiment is very close to the true value. D A set of results with good accuracy suggests that there are little systematic errors in the experiment. P Q P − Q P Q P − Q P Q P − Q P Q P − Q

5 [Turn over 3 After taking measurements of the quantities in the expression x2y z , the total percentage uncertainty is calculated as 6%. Which individual percentage uncertainties of x, y and z when combined give this total of 6%? x / % y / % z / % A 1 1 4 B 1 2 2 C 2 3 2 D 4 1 1 4 Two identical ball bearings are held at the same height above the ground. One bearing is released from rest. A short time later, the other bearing is released from rest. Air resistance is negligible. As they fall, which of the following statements is true about the vertical distance between them? A The distance will increase continuously. B T