Whitley Prelim P1

nName : ( ) Class: WHITLEY SECONDARY SCHOOL A Caring and Learning Community of Leaders Perseverance * Respect * Integrity * Discipline *Empathy PRELIMINARY EXAMINATION 2024 READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and index number on the Answer Sheet in the spaces provided unless this has been done for you. 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. ______________________________________________________________ This document consists of 13 printed pages and 3 blank pages. SUBJECT : Physics (6091) Paper 1 LEVEL : Sec 4 G3 DATE : 26 Aug 2024 DURATION : 1 hour SETTER : Mr Ng Mun Leong VETTER : Ms Kuah Li Wen

2 1 What represents a physical quantity? A 5.0 B kilogram C 2.7 N D 90% 2 How many vector quantities appear in the list below? work done displacement voltage pressure weight moment A 2 B 3 C 4 D 5 3 The graph illustrates the motion of an object. Which part of the graph represents the object moving with a decreasing speed? 4 A sphere falls from rest through the air. The graph shows the variation of the sphere’s velocity with time. Which diagram shows the forces acting on the sphere when it is at the velocity corresponding to point P on the graph? A B C D time displacement 0

3 5 A wooden box of mass 2.0 kg is pushed horizontally across a table. If the acceleration of the block is 0.40 m/s2 and the frictional force acting against the block’s motion is 20 N, determine the magnitude of the pushing force. A 0.80 N B 19.2 N C 20 N D 20.8 N 6 A man pushes a heavy box along the ground. A force acts between the man’s hands and the box. Another force acts between the man’s feet and the floor. In which directions do these forces act on the man? force on man’s hands force on man’s feet A towards the left towards the right B towards the left towards the left C towards the right towards the right D towards the right towards the left 7 Two forces act at right angles at a point O as shown. What is the resultant force? magnitude direction A 15 N OQ B 15 N PR C 21 N OQ D 21 N PR pushing force wooden block table R Q O 12 N P 9 N

4 8 The graph shows the volume and density of several different objects. Which two objects have the same mass? A P and Q B P and R C R and T D S and T 9 A non-uniform object is placed on an inclined plane as shown below. In this position, it is just about to topple. Which point is likely the centre of gravity? 10 A washing machine has a power input of 2.5 kW. What is the work done in half an hour if the washing machine has an efficiency of 95%? A 71 kJ B 79 kJ C 4275 kJ D 4737 kJ density volume 0 P R Q S T A C B D non-uniform object

5 11 The diagram below shows a hydraulic pump. Compressed air is pumped into the small cylinder to lift a car. Which statement is true? A Force F is equal to the weight of the car. B Pressure on the piston in the large cylinder is larger than the pressure in the small cylinder. C Ratio of force F in the small cylinder to the weight of the car is 6:1. D Ratio of the pressure in the small cylinder to the pressure on the piston in the large cylinder is 1:1. 12 The diagram shows a mercury barometer. A liquid which is less dense than mercury exists above the mercury column. This liquid does not mix with mercury. Given that the atmospheric pressure is 76 cm Hg, the density of liquid is 1200 kg/m3 and the density of mercury is 13600 kg/m3, determine the height X of the liquid column. A 2.0 cm B 22.7 cm C 26.0 cm D 76.0 cm area = 0.5 m2 area of piston = 3 m2 F small cylinder large cylinder air compressor car surface level oil vacuum liquid mercury 74 cm X

6 13 Which diagram represents the change in the arrangements of the particles in a liquid as it freezes? A B C D 14 A piece of ordinary kitchen aluminum foil is used to wrap around food to be cooked in a barbecue fire. The foil has a shiny side and a dull side. Which side should be on the outside and why? A The dull side should be on the outside because it is a better emitter of thermal radiation. B The dull side should be on the outside because it absorbs thermal radiation better. C The shiny side should be on the outside because it is a better thermal conductor. D The shiny side should be on the outside because it is a better absorber of thermal radiation. 15 A tiled floor normally feels cooler than a carpeted floor. Which of the following is the most appropriate explanation? A tiled floor is a better conductor of heat than the carpet B tiled floor is a better radiator of heat than the carpet C tiled floor is a better reflector of heat than the carpet D tiled floor has a larger specific heat capacity than the carpet

7 16 Four blocks of equal masses are made from different materials. Each block is heated so that they have the same increase in internal energy. Which block has the smallest specific heat capacity? A B C D 17 The figure below shows a water wave travelling in a ripple tank. The wavefront at X travels to Y in 5.0 s. What is the frequency of the water wave? A 0.60 Hz B 3.0 Hz C 15 Hz D 75 Hz 18 Which of the following correctly lists three waves in order of decreasing wavelength? A gamma rays, microwaves, visible light B visible light, gamma rays, radio waves C ultra-violet radiation, infrared radiation, microwaves D radio waves, infra-red radiation, X-rays 19 Which of the following is/are longitudinal waves? I light from the sun II sound produced by whales III x-ray IV water wave in a water tray A II only B II and IV C I , III, and IV D I , II, III and IV 15 cm X Y

8 20 A bat produces ultrasound and audible sound at the same time. Which of the following is true? A Ultrasound travels faster than the audible sound. B Ultrasound and audible sound will reach the same distance at the same time. C The wavelength of the ultrasound is longer than the wavelength of the audible sound. D Ultrasound and audible sound have the same frequency. 21 A light ray passes through a triangular glass prism of refractive index 1.5. What is angle θ? A 51° B 53° C 56° D 61° 22 An object is viewed through a converging lens. The diagram shows the paths of two rays from the top of the object to an eye. How does the image compare with the object? A It is larger and inverted. B It is larger and upright. C It is smaller and inverted. D It is smaller and upright. 23 What is meant by the term wavefront? A A line joining a trough and a crest on a wave. B A line joining all the troughs on a wave. C The distance between successive cres