2023 TPSS Phy Prelims P1

TAMPINES SECONDARY SCHOOL Secondary Four Express PRELIMINARY EXAMINATION 2023 NAME CLASS REGISTER NUMBER PHYSICS 6091/01 Paper 1 Multiple Choice 21 Aug 2023 1 hour Additional Instructions Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and register number on the Answer Sheet in the spaces provided unless this has been done for you. There are forty questions in 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 answer 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. This document consists of 15 printed pages. © TPSS/6091/01/2023/SEC4/PRELIMS O

2 1 Which of the following is a possible reading obtained from using a metre rule? A 0.6 m B 0.64 m C 0.643 m D 0.6431 m 2 Peng Zhong used a micrometer screw gauge to measure the thickness of a metal sheet. The diagram shows part of the apparatus. However, this micrometer screw gauge has an inherent zero error of –0.03 mm. What is the actual thickness of the metal sheet? A 7.80 mm B 7.86 mm C 10.30 mm D 10.36 mm 3 Which car, moving from rest, has an average acceleration of 2.5 m/s2? A a car reaching a speed of 10 m/s in 2.5 s B a car reaching a speed of 25 m/s in 2.5 s C a car reaching a speed of 30 m/s in 20 s D a car reaching a speed of 50 m/s in 20 s 4 A 20 N force pushes a 5.0 kg object along a horizontal rough surface where the frictional force is 5.0 N. What is the acceleration of the object? 5 40 35 30 25

3 A 1.0 m/s2 B 3.0 m/s2 C 4.0 m/s2 D 5.0 m/s2 5 A tray supports a 1 kg mass and a 3 kg mass as shown. The gravitational field strength is 10 N/kg. What is the force acting on the 1 kg mass by the 3 kg mass? A 10 N B 20 N C 30 N D 40 N 6 The acceleration due to the gravity of the Moon is one-sixth of that of the Earth. If a stone is thrown upwards, which graph shows the variation of the speed of the stone with time as it goes up on the Moon and on the Earth? A B C D tray 3 kg 1 kg 0 Earth speed m/s time / s Moon 0 Earth speed m/s time / s Moon 0 Earth speed m/s time / s Moon 0 Earth speed m/s time / s Moon

4 7 Four forces are applied to a circular object as shown in the diagram. Which of the following gives the correct resultant moment and resultant force on the object? 8 The table below gives the height of the centre of gravity above the base and the base area of several cuboids. Which of the following statements is true? A P has the greatest stability while R has the least stability. B R has the greatest stability while Q has the least stability. C R has the greatest stability while S has the least stability. D Q has the greatest stability while R has the least stability. 50 N 50 N 25 N 25 N resultant moment resultant force A zero zero B non zero zero C zero non zero D non zero non zero cuboid height of centre of gravity base area P 4 cm 5 cm2 Q 4 cm 10 cm2 R 6 cm 5 cm2 S 6 cm 10 cm2

5 9 A load is pushed along three different lengths of ramps from ground level to a height 10 m above the ground. All the ramps are of the same material but placed at different angles from the ground. All the ramp’s surfaces are frictionless, and the load moves at constant speed throughout. Which path will require the most amount of energy in pushing the load up? A path X B path Z C path Y D equal amount of work is done for every path 10 mramp ramp ramp X Y Z

6 10 Jaden uses 10 N to push a 0.80 kg box up a 5.0 m slope. The box also experiences a resistive force F along the slope. The gravitational field strength is 10 N/kg. What is the magnitude of F? A 2.0 N B 5.2 N C 9.5 N D 10 N 11 The diagram shows a hydraulic jack. The cross- sectional area of piston Y is six times larger than piston X. When a 30 N force is applied onto piston X, it moves downwards. As a result, an upward force, F, acts on piston Y and the load moves upwards. What is the magnitude of the upward force, F, exerted on the load? A 5.0 N B 30 N C 60 N D 180 N 5.0 m 10 N 3.0 m 4.0 m F load piston X piston Y liqui d 30 N

7 12 Ryo filled a cup with water and covered it with a piece of cardboard. He observed that when he inverted the cup, the cardboard remains in place and the water does not flow out of the cup. Which of the following explains his observation? A The atmospheric pressure is equal to the weight of the water. B The suction force of the water on the cardboard prevents it from falling. C The upward force exerted by the air on the cardboard is equal to the weight of the water. D The pressure exerted by air on the cardboard is equal to the pressure acting on the cardboard due to the weight of the water. 13 The diagram shows a U-tube filled with mercury. The left arm is sealed, and the right arm is exposed. There is some trapped air in region X. The atmospheric pressure is 760 mmHg. What is the pressure of the trapped air in region X? A 726 mmHg B 744 mmHg C 776 mmHg D 794 mmHg 14 A centimetre scale is placed next to an unmarked mercury-in-glass thermometer. The ice point and the steam point are marked. What is the temperature shown on the thermometer? 50 mm 16 mm mercury region X piston gas stopper Force thermometerice point centimetre scale steam point 6.6 cardboard watercup

8 A 44 oC B 56 oC C 60 oC D 66 oC 15 The graph shows how the temperature difference between junctions X and Y of a thermocouple causes a variation in the deflection of a milli-voltmeter. If X is placed in a substance of 25 oC and Y is placed in another substance of higher temperature, a deflection of 26 mV is seen. What is the temperature of Y? A 79 oC B 104 oC C 129 oC D 145 oC 16 In which of the following scenarios is conduction the primary mode of heat transfer? A cooking food in an oven B cooling a room with air conditioner C melting ice by placing it on a hot stove D feeling the warmth of the sun on your skin 17 Which of the following factors affects the rate of convection current? (i) temperature difference (ii) location of heat source temperature difference / oC deflection / mV 6 0 4 0 2 0 5 10 15

9 (iii) density of material A (i) only B (i) and (ii) only C (i) and (iii) only D All of the above 18 Different surfaces absorbed different proportions of the Sun’s radiant energy. The diagram shows the percentage of thermal energy absorbed by some surfaces. Which is the best way to treat a flat roof to reduce the amount of heat absorbed by the roof? A cover the roof with a layer of red brick dust B cover the roof with a layer of soil C paint the roof black D paint the roof white 0 20 40 60 80 100 white paint red brick soil black paint percentage of heat energy absorbed / %

10 19 The table below shows the properties of four substances, A, B, C and D at 80 oC and 150 oC. at 80 oC at 150 oC substance definite volume definite shape definite volume definite shape A no no no no B yes yes yes no C yes no no no D yes no yes no Which of the following best identifies the possible melting point and boiling point of substances A, B, C and D? 20 The diagram shows two rays of light from an object O being reflected from a plane mirror. At which position will the image be formed? 21 A thin converging lens of focal length 15 cm forms a real, inverted and magnified image of an object placed at a distance u from the lens. What are the possible values of u? (i) 15 cm (ii) 20 cm (iii) 25 cm (iv) 30 cm A (i) and (ii) B (ii) and (iii) C (i), (ii) and (iii) A B C D O plane mirro r substance