ADSS Prelim P1

This question paper consists of 18 printed pages including this cover page. ADMIRALTY SECONDARY SCHOOL SUBJECT : Physics CODE/PAPER : 6091/1 LEVEL/STREAM : Secondary 4 Express DATE : 23 Aug 2024 TIME : 1130h – 1230h DURATION : 1 hour 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 Optical Answer Sheet 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 Optical Answer Sheet. Fill in the Optical 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 question paper. The use of an approved scientific calculator is expected, where appropriate. DO NOT TURN OVER THIS PAPER UNTIL YOU ARE TOLD TO DO SO. PRELIMINARY EXAMINATION 2024 NAME: NO: CLASS: 40

2 1 A list of physical quantities is shown. length mass speed temperature time volume How many of these quantities are base quantities? A 2 B 3 C 4 D 5 2 Which is the likely estimate of the radius of a hydrogen nucleus? A 10 -8 m B 10-10 m C 10-12 m D 10-15 m 3 The bob of a simple pendulum is displaced slightly to one side and then released. The motion of the swinging bob is represented by the following graph. What is the frequency of the swinging pendulum bob? A 0.50 Hz B 1.0 Hz C 2.0 Hz D 4.0 Hz distance from point of release / cm time /s

3 4 The diagram below shows the velocity-time graph of a falling object. Which statement is true? A Air resistance caused the object to decelerate. B The acceleration due to gravity decreases with time. C The acceleration of the object at t = 0 s is 10 m/s2. D The object stops moving after 40 s. 5 Four of the gravitational forces that act between planets in our Solar System are listed below. W: the force on the Earth due to the Moon X: the force on the Sun due to the Earth Y: the force on the Moon due to the Earth Z: the force on the Sun due to the Moon Which two forces are an action-reaction pair? A W and Y B W and Z C X and Y D X and Z 6 Experiments are carried out on the Moon and on Earth. There is no atmosphere on the Moon and the gravitational field strength on the Moon is less than that on Earth. A coin and a feather are dropped at the same instant from the same height. Which statement is correct for the experiment on the Moon? A The coin falls faster than the feather, taking a longer time than they take on Earth. B The coin falls faster than the feather, taking a shorter time than they take on Earth. C They fall together, taking a longer time than they take on Earth. D They fall together, taking a shorter time than they take on Earth. velocity m/s time /s 0 20 40 60 80 100 15 10 5 0

4 7 A student swings a toy plane in a circle on a string. What path (top view) would the toy plane take if the string suddenly breaks? A B C D

5 8 The diagram below shows the cross-section of a uniform pyramid of weight 10.0 N. What is the minimum value of the force F that is required to just tilt the pyramid about X? A 2.5 N B 5.0 N C 10.0 N D 20.0 N 9 The diagram shows a single brick and a pile of three bricks. All the bricks are identical. Which of the following best describes the three bricks, as compared to the single brick? A three times the mass, volume and density B three times the mass and density, but the same volume C three times the density and volume, but the same mass D three times the mass and volume, but the same density F 5.0 cm 5.0 cm

6 10 In a hydraulic press as shown, the small piston of 100 N is pushed down and this is just sufficient to raise a heavy load in the large piston. Neglecting the weight of the pistons, what is the maximum load that can be lifted? A 10 N B 100 N C 1000 N D 10 000 N 11 A battery-operated remote-control car is switched on. What is the principal energy transfer taking place when it switches on? A chemical potential store to internal store of energy B kinetic store to internal store of energy C chemical potential store to kinetic store of energy D kinetic store to chemical potential store of energy 12 A machine is able to lift 150 000 g of bricks vertically up to a height of 30 m above the ground in 50 s. What is the power of the machine? A 0.9 kW B 900 kW C 45 kW D 2250 kW large piston of area 30 cm2 small piston of area 3.0 cm2 load 100 N X Y oil

7 13 Smoke particles in a sealed container are illuminated by a beam of light. Under a microscope, the smoke particles are observed to move at random speeds and change directions randomly. What causes this motion? A Collisions between smoke particles. B Collisions with rapidly moving air molecules. C Atomic vibrations within the smoke particles. D Energy provided by the beam of light shining into the container. 15 A metal cup with a shiny silver surface is filled with boiling water. A man touches the outer surface of the cup and finds it very hot. Why is the surface hot? A Boiling water gives off latent heat. B The metal cup is a good thermal conductor. C Convection takes place in the boiling water. D The shiny silver surface is a good emitter of radiation. 16 A student, who is perspiring profusely, stands under a ceiling fan. What is the main reason for her to feel cooler after some time? A The fan sets up a convection current around her. B The fan absorbs the radiation from her body at a faster rate. C The fan increases the rate of evaporation of perspiration from her body. D The fan increases the rate of radiation from her body to the surroundings. 14 Substances in gaseous state are less dense than when they are in liquid state or solid state because A the molecules at gaseous state expand more than when they are in liquid or solid state B the space between two molecules in gaseous state is wider than when it is in solid state and liquid state C the molecules in gaseous state are in Brownian motion D the molecules in gaseous state have smaller mass than when they are at liquid or solid state.

8 18 A cup of water at 8 °C was cooled to ice at – 8 °C. Given that ice has a lower specific heat capacity than water, which of the following cooling curves shows how the temperature changes with time? A B C D 17 Which statement describes the process of boiling? A Boiling occurs at any temperature and throughout a liquid. B Boiling occurs at a fixed temperature and throughout a liquid. C Boiling occurs at any temperature and only on the surface of a liquid. D Boiling occurs at a fixed temperature and only on the surface of a liquid. 19 4000 J of energy is used to heat up a copper block from 50 °C to 70 °C. What is the mass of the copper block, given that the specific heat capacity of copper is 400 J/(kg °C)? A 0.5 kg B 1.0 kg C 10 kg D 200 kg temperature time temperature temperature temperature time time time

9 20 The diagram shows two corks, X and Y, floating on water. What will happen to both corks as the wave passes? A Both X and Y will move downwards. B Both X and Y will move upwards. C X will move downwards and Y will move upwards. D X will move upwards and Y will move downwards. 21 A periscope is constructed using two mirrors mou