Boon Lay Prelim P1

BOON LAY SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 Name ( ) Class Subject : PHYSICS Paper No : 1 Subject Code : 6091/01 Level : SECONDARY FOUR EXPRESS Date/Day : 27 AUGUST 2024 (TUESDAY) Time : 1200 – 1300 Duration : 1 HOUR READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and index number 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 paper. The use of an approved scientific calculator is expected, where appropriate. This paper consists of 16 printed pages.

2 Answer all the questions. 1 A closed umbrella, P, and an opened umbrella, Q, are suspended from a significant height in a tall vacuum chamber on Earth. Both umbrellas are released at the same time. Which of the following will be observed? A Both umbrellas will not accelerate. B The closed umbrella will reach the ground first. C Both umbrellas will have the same instantaneous speed. D The opened umbrella will fall slower than the closed umbrella. 2 A cyclist passes a lamp post with a speed of 10 m s-1. His speed at the next lamp post, 15 m away, is 25 m s-1. What is his acceleration between these two lamp posts? A 0.86 m s-2 B 17.5 m s-2 C 35.0 m s-2 D 40.8 m s-2

3 BLS/Prelims/2024/4E/Physics/6091/01 3 The graph shows the distance-time graph of a car. Which of the following is the correct velocity-time graph of the car in the same time period? A B C D 4 A force of 5.0 N and a force of 6.0 N act on a single point. Which of the following is not a possible magnitude of the resultant force on the point? A 1 N B 5 N C 9 N D 12 N

4 BLS/Prelims/2024/4E/Physics/6091/01 5 The displacement method is used to determine the volume of an acorn. The mass and density of a particular acorn are 4.5 g and 1.03 g cm-3 respectively. What is the final volume of water in the beaker when the acorn is fully submerged? A 4.64 cm3 B 45.63 cm3 C 54.37 cm3 D 54.64 cm3 6 Three identical Bunsen burners are in different positions on a horizontal surface. P Q R Which of the following correctly states the type of equilibrium they are in? P Q R A Stable Neutral Unstable B Neutral Unstable Stable C Stable Unstable Neutral D Neutral Stable Neutral 7 A 5 N force is applied on the signboard shown below, resulting in a turning effect about the pivot, P. Which of the following forces will stabilise the signboard?

5 BLS/Prelims/2024/4E/Physics/6091/01 8 The hydraulic press on the right is filled with an incompressible fluid and the cross-sectional areas of the platforms at P and Q are 2 m2 and 10 m2 respectively. How many bowling pins can be placed at Q while maintaining equilibrium? A 1 B 3 C 5 D 7 9 A ball is dropped on a hard surface and bounces back to a height that is lower than its starting point. Which of the following accounts for the lower rebound height? A Energy is destroyed along the way. B The chemical and elastic potential energies of the ball have increased. C The internal (heat) energy of the ball and its surroundings have increased. D Energy is gained in the kinetic store of the ball when the ball bounces on hard surface. 10 A stone is shot vertically upwards with a slingshot with an initial speed of 32 m s-1. Calculate the theoretical maximum height that the stone reaches. Take acceleration due to gravity, g as 10 m s-2. A 1.6 m B 3.2 m C 51.2 m D 512 m 11 The braking force of a moving object is the amount of force required to bring it to a complete stop. A car of mass 1350 kg is travelling at 5 m s-1. What is the braking force required to stop the car in 18 m? A 188 N B 938 N C 1875 N D 9375 N

6 BLS/Prelims/2024/4E/Physics/6091/01 12 The diagram shows the path taken by a single smoke particle suspended in water over a short period of time. Which of the following correctly explains the motion of the smoke particle? A The smoke particle moves along a pre-planned path. B The smoke particle is following the path of least resistance. C The smoke particle is expelling energy in random directions. D The smoke particle is being bombarded by water particles in random directions. 13 The diagram shows particles of a gas enclosed in a container with a fixed volume. What happens to the particles when the container is heated? A The particles expand. B The average speed of the particles will increase. C The average distance between particles will increase. D The average force the particles apply on the walls of the container will decrease. 14 A vacuum double-walled glass is commonly used to contain hot beverages like coffee or tea. Which of the following correctly explains the reason for its use? A The double-wall prevents heat lost through radiation. B The double-wall prevents heat lost through convection. C The double-wall increases heat gained from the surroundings through conduction. D The double-wall increases heat gained from the surroundings through convection.

7 BLS/Prelims/2024/4E/Physics/6091/01 15 Which of the following statements is true about thermal radiation? A Thermal radiation only occurs on hot objects. B Absorption of thermal radiation is higher on shiny objects. C Absorption of thermal radiation is higher on black objects. D A medium is required to transfer energy via thermal radiation. 16 Two rods that are identical in shape and size are cooled to 20 °C. One rod is made of plastic and the other is made of metal. Which of the following statements is true? A The metal rod will feel cooler as it is colder. B The plastic rod will feel cooler as it is colder. C The metal rod will feel cooler as it is a better conductor of heat. D The plastic rod will feel cooler as it is a better conductor of heat. 17 Four cubes of the same mass are made from different materials. The same amount of thermal energy is transferred to each of them and the rise in temperature is recorded. Which of the cubes has the lowest specific heat capacity? A B C D Temperature rise = 9 °C Temperature rise = 2 °C Temperature rise = 5 °C Temperature rise = 4 °C 18 2000 J of thermal energy is used to heat up 10.0 g of ice. The specific latent heat of fusion of ice is 340 J g-1. How much ice remains after heating? A 0.17 g B 4.12 g C 5.88 g D 9.83 g

8 BLS/Prelims/2024/4E/Physics/6091/01 The diagram shows the heating curve of 1 kg of an object made of a pure substance. Answer questions 19 and 20 using information from the diagram. 19 Which of the following gives the correct state of matter for the range indicated? Range State A P Liquid B Q Solid C R Liquid D R Gas 20 In which part of the heating curve (P, Q, R, S, T) does the average kinetic energy of the particles increase the most? A P B R C S D T

9 BLS/Prelims/2024/4E/Physics/6091/01 21 The wave generator oscillates at 50 Hz and produces the wave shown on the right. What is the speed of the wave? A 0.4 cm s-1 B 2.5 cm s-1 C 250 cm s-1 D 1