PRCSS Prelim P1

[Turn over PASIR RIS CREST SECONDARY SCHOOL Preliminary Examination Secondary Four Express CANDIDATE NAME CLASS / INDEX NUMBER Physics 6091/01 Paper 1 Multiple Choice 26 August 2024 1 hour 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 index number on all the work you hand in. 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 40 Parent’s Signature This document consists of 12 printed pages.

2 1 A car driver brakes with uniform deceleration when he sees a stop line 15 m ahead. The car stops at the stop line in 3.0 s. What is the speed of the car when the driver sees the stop line? A 5.0 m/s B 10 m/s C 20 m/s D 45 m/s 2 A parachutist falls from an airplane. As he falls, he experiences air resistance. The parachute is not opened yet. Graph 1 and 2 are displacement-time graphs. Graph 3 and 4 are velocity-time graphs. 1 2 3 4 Which graphs describe the motion of the parachutist? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4 3 An astronaut initially weighs 800 N on the Earth. He travels to the Moon and does some physical work daily. He weighs 120 N on the Moon after a month. The gravitational field strength on the Moon is 1.6 N/kg. The gravitational field strength on the Earth is 10 N/kg. How much mass is lost by the astronaut? A 0 kg B 5 kg C 20 kg D 68 kg 4 An uniform cylinder of weight 30 N is placed next to a step as shown. The radius of the cylinder is 50 cm and the height of the step is 20 cm. What is the minimum force required to move the cylinder up the step? A 12 N B 15 N C 20 N D 30 N t s t s t v t v cylinder step

3 [Turn over 5 A pushing force moves an object of mass 4.0 kg at an acceleration of 2.0 m/s2 along a rough horizontal surface where the frictional force is 6.0 N. What is the pushing force acting on the object? A 2.0 N B 6.0 N C 8.0 N D 14 N 6 An alloy is made up of copper and tin. The copper has a volume of 40 cm3 and a density of 9.0 g/cm3. The tin has a volume of 10 cm3 and a density of 7.3 g/cm3. What is the density of the alloy? A 8.2 g/cm3 B 8.5 g/cm3 C 8.7 g/cm3 D 8.9 g/cm3 7 A manometer is connected to a gas supply as shown. The atmospheric pressure is 76 cm Hg. The density of mercury is 13 600 kg/m3. The gravitational field strength is 10 N/kg. What is the pressure of the gas? A 27 kPa B 100 kPa C 110 kPa D 130 kPa 8 A non-uniform object is balanced on a pivot when a weight is suspended on the object as shown. Which point is likely to be the centre of gravity of the object? A B C D weight object pivot

4 9 A barometer contains water. If w, x, y and z are measured in metres, the atmospheric pressure in metres of water measured by the barometer is A x B w + x C x + y D x + y + z 10 A ball of mass 1.0 kg rolls up a long and smooth ramp. At the bottom of the ramp, the speed of the ball is 5.0 m/s. The gravitational field strength is 10 N/kg. What is the speed of the ball when it is at 45 cm above the bottom of the ramp? A 0 m/s B 4.0 m/s C 5.0 m/s D 16 m/s 11 Energy is transferred electrically to a motor, which has an efficiency of 75%. The useful output energy from the motor is 90 kJ. How much non-useful output energy is wasted from the motor? A 23 kJ B 30 kJ C 68 kJ D 120 kJ 12 A cyclist accelerates up a hill. The energy in the chemical potential store of the cyclist is transferred to A gravitational potential store and internal store of the cyclist. B kinetic store and internal store of the cyclist. C gravitational potential store and kinetic store of the cyclist. D gravitational potential store, kinetic store and internal store of the cyclist. w x y z 45 cm 5.0 m/s

5 [Turn over 13 What happens to a fixed mass of gas when the gas is cooled at a constant volume? A The average volume of the particles decreases. B The average mass of the particles decreases. C The average speed of the particles decreases. D The average separation of the particles decreases. 14 A mug of hot coffee is left on a table. Energy is transferred out from the hot coffee by A conduction only. B conduction and convection only. C radiation only. D conduction, convection and radiation. 15 Which statement describes the evaporation of a liquid? A It occurs at any temperature and throughout the liquid. B It occurs at any temperature and only on the surface of the liquid. C It occurs at a fixed temperature and throughout the liquid. D It occurs at a fixed temperature and only on the surface of the liquid. 16 The graph shows how the temperature of water varies with time when heated. Which row describes the changes in the kinetic and potential energy of the water particles when the temperature of the water increases? kinetic energy potential energy A constant constant B constant increases C increases constant D increases increases time temperature

6 17 Latent heat and specific latent heat have different definitions. Which statement describes the difference? A Latent heat involves 1 kg of material, specific latent heat does not. B Latent heat involves a change in state, specific latent heat does not. C Specific latent heat involves 1 kg of material, latent heat does not. D Specific latent heat involves a change in state, latent heat does not. 18 Which surface is the best emitter of radiation? A black and rough surface B black and smooth surface C white and rough surface D white and smooth surface 19 The diagram shows a graph of wave motion. What is the frequency of the wave? A 0.5 Hz B 1.0 Hz C 1.5 Hz D 2.0 Hz 20 It takes 20 s to generate 50 complete wavelengths in a ripple tank, The wavelength of each wave is 3.0 cm. What is the speed of the wave? A 1.2 cm/s B 2.5 cm/s C 3.0 cm/s D 7.5 cm/s 21 Two notes of different pitch but the same loudness are played on a musical instrument. Which statement about the note of higher pitch is correct? A It has a smaller wavelength. B It has a larger wavelength. C It has a lower speed in air. D It has a higher speed in air. displacement / cm time / s 0 0.5 1.0 1.5 2.0 2.5 3.0 −3.0

7 [Turn over 22 A student stands at point P between two walls as shown and claps once. The speed of sound is 320 m/s in air. What is the time interval between the first and second echo heard by the student? A 0.25 s B 0.50 s C 0.75 s D 1.0 s 23 Which wave is used to disinfect water? A infrared B ultraviolet C X-rays D gamma rays 24 The diagram shows a ray of light striking on a plane mirror. Through which angle does the direction of the ray of light change? A 40° B 80° C 100° D 280° 25 A ray of light travels from glass and refracts into air. The refractive index of the glass is 1.5. What is angle r? A 25° B 33° C 60° D 75° 160 m 40 m P 40° air glass 50° r

8 26 A student rubs a