2023 CHS Phy Prelims P1

Name: Index Number: Class: CATHOLIC HIGH SCHOOL Preliminary Examination Secondary 4 (O-Level Programme) PHYSICS 6091/01 Paper 1 Multiple Choice 29 Aug 2023 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 this paper and 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 / 40 Overall Marks % Paper 1 40 30% Paper 2A 50 50% Paper 2B 30 Paper 3 40 20% This document consists of 18 printed pages.

2 1 Which pair of units are both SI base units? A ampere, degree Celsius B ampere, kelvin C coulomb, degree Celsius D coulomb, kelvin 2 A micrometer screw gauge is used to measure the diameter of an object. It has a zero error of -0.02 mm. What is the estimated diameter of the object? A 6.63 mm B 6.65 mm C 8.13 mm D 8.15 mm 3 An object accelerates uniformly from rest . The effects of friction and air resistance are negligible. The object travels a distance of 40 m in 4.0 s. What is the acceleration of the object? A 0.40 m / s2 B 2.5 m / s2 C 5.0 m / s2 D 20 m / s2

3 4 The graph shows how the acceleration of an object moving in a straight line varies with time. Which graph shows the variation with time of the velocity of the object? A B C D

4 5 A helium balloon is tied to a top -pan balance. A metal block of mass 100 g is placed on the balance. The reading on the balance is 91 g. Which statement can be deduced from the experiment? A The balloon has a weight of 0.91 N. B The balloon exerts a downward force of 0.09 N on the top-pan balance. C The resultant downward force on the top-pan balance is 0.91 N. D The top-pan balance measures the weight of the objects placed on it.

5 6 The diagram shows a sign of weight 20 N suspended from a pole, attached to a wall. The pole is kept in equilibrium by a wire attached at point X of the pole. The force exerted by the pole at point X is F, and the tension in the wire is 40 N. Which diagram represents the three forces acting at point X? A B C D 7 A 120 kg rock is vertically suspended from a support on the Moon. When an astronaut applies a hori