CHS 2021 - Sec 4 PHYSICS Prelim Exam PAPER 1 - Questions

1 Name: Index Number: Class: CATHOLIC HIGH SCHOOL Preliminary Examination Secondary 4 (O-Level Programme) PHYSICS 6091/01 Paper 1 Multiple Choice 16 September 2021 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use paper clips, glue or correction fluid. Write your name, index number and class on the Answer Sheet in the spaces provided. There are forty 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. For examiner’s use only: Total Marks / 40 Paper Type of Paper Marks Weighting 1 Multiple Choice 40 30 % 2 Theory 80 50 % 3 Practical 40 20 % This document consists of 16 printed pages.

2 1 Which one of the following base quantities is paired correctly? Physical Quantity SI unit A electric current A B length cm C mass g D temperature °C 2 Which one of the following has the same value as 0.1 µm? A 0.0001 nm B 100 nm C 0.0001 cm D 100 cm 3 The diameter of a piece of wire is measured using a micrometer screw gauge. A student takes an initial zero reading and then a reading of the diameter. The following figures show enlargements of the micrometer screw gauge readings. What is the diameter of the wire? A 1.86 mm B 2.36 mm C 2.48 mm D 2.98 mm 4 A student dropped a metal sphere and a ping-pong ball from a thirty-storey building. The balls have the same volume and there was significant air resistance as the objects were falling. He made the following statements: I Both objects will have the same initial acceleration. II The metal sphere will have a greater final velocity than the ping-pong ball when it hits the ground. III The metal sphere will reach the ground first. Which of the statements are correct? A I and II B I and III C II and III D I, II and III

3 5 A girl throws a ball vertically upwards. It takes a time of 3.20 s to return to her hand. Assume air resistance is negligible. What is the initial speed with which the ball is thrown? A 3.2 m/s B 6.4 m/s C 16.0 m/s D 32.0 m/s 6 Two forces of equal magnitude are represented by two vectors on the same plane. One is directed towards the east and the other is directed towards the north. What is the direction of a single force that will balance these two forces? A towards the north-east B towards the north-west C towards the south-east D towards