NJC_2024_H2_Physics_Prelim_P1

[Turn over NATIONAL JUNIOR COLLEGE SENIOR HIGH 2 PRELIMINARY EXAMINATION Higher 2 CANDIDATE NAME SUBJECT CLASS REGISTRATION NUMBER PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 9749/01 18 September 2024 1 hour READ THE 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 answer 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. The OAS index number is in a 5-digit format. The 5-digit format is as follows: 2nd digit and the last four digits of the Reg Number. e.g. 2005011 becomes 05011 This document contains 15 printed pages and 1 blank pages. H

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4 1 What is the number of heartbeats of a person at rest in one hour, to the nearest order of magnitude? A 101 B 102 C 103 D 105 2 Which experimental technique reduces the systematic error of the quantity being investigated? A measuring the diameter of a wire repeatedly and calculating the average B measuring several internodal distances on a standing wave to find the mean internodal distance C adjusting an analogue ammeter to remove its zero error before measuring a current D timing a large number of oscillations to find a period 3 A block is projected at a certain speed up a frictionless slope. Which of the following graphs correctly shows the relationship between the kinetic energy of the block and the displacement of the block along the slope after its point of projection? A B C D 4 Drops of water falls from the roof of a building 9.0 m high at regular intervals of time. The first drop reaches the ground at the instant the fourth drop starts its fall. What is the distance between the second and third drops from the roof? A 1.0 m B 3.0 m C 4.0 m D 5.0 m Kinetic Energy Kinetic Energy displacement Kinetic Energy displacement Kinetic Energy displacement displacement displacement

5 [Turn over 5 Two objects are being pulled along a smooth floor by a 70 N force as shown. Object A has a mass of 20 kg and object B has a mass of 6.0 kg. The masses do not slide against each other. A B 70 N Which line of the table correctly states the magnitude and direction of friction on A by B? mag