Yuan Ching Prelim P1

YUAN CHING SECONDARY SCHOOL Secondary Four Express Course Preliminary Examination 2024 CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 1 Multiple Choice Additional Materials : Multiple Choice Answer Sheet 6091 / 01 11 September 2024 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 index number on the Answer Sheet in the spaces provided unless this has been done for you. There are forty questions for 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. The total number of marks for this paper is 40. This paper consists of 16 printed pages.

2 1 What is the order of magnitude of the diameter of a strand of hair? A 10 mm B 103 cm C 104 μm D 105 nm 2 A newly purchased pendulum clock is found to be slower by 1 min. Which of the following will correct the error? A decreasing the length of the pendulum B decreasing the mass of the pendulum C increasing the length of the pendulum D increasing the mass of the pendulum 3 A diver jumps off from the diving board with an initial speed and decelerates uniformly to a momentary stop before falling with constant acceleration. On entering the water, he experiences a decreasing deceleration and then reaches a constant speed. Which of the following speed-time graphs represents the motion of the diver? A B C D time / s speed / m s-1 speed / m s-1 speed / m s-1 speed / m s-1 time / s time / s time / s

3 4 The speed-time graph below describes the motion of a toy car. What is the average speed of the toy car while moving at constant deceleration? A 4.0 m/s B 5.1 m/s C 8.0 m/s D 24 m/s 5 A block of wood of mass 4 kg moves with an acceleration of 0.8 m/s2 when it is pulled along a rough surface with a force of 15 N. What is the deceleration of the block when the 15 N force is removed? A 0.00 m/s2 B 0.80 m/s2 C 2.95 m/s2 D 3.20 m/s2 6 A rocket of mass 3.50 x 105 kg has a vertical lift off with an upward thrust of 4500 kN. The gravitational field strength is 10 N/kg. What is the initial acceleration of the rocket? A 0.0777 m/s2 B 2.86 m/s2 C 9.99 m/s2 D 12.9 m/s2 7 Six bags of flour, each of mass 2.5 kg, were used to fill up a box shown below. The box of dimensions 0.30 m × 0.25 m × 0.25 m has a mass of 0.5 kg. 0.25 m 0.30 m 0.25 m What is the average density of the box after it is filled up? A 26.7 kg/m3 B 160 kg/m3 C 800 kg/m3 D 827 kg/m3 speed / m s-1 time / s 8 22 16 10 0 4 kg 15 N rough surface 0.30 m 0.25 m 0.25 m

4 8 The graph below represents the relationship between the gravitational force and the mass of a falling object in a vacuum container. What is the gradient of the graph? A acceleration of the object B inertia of the object C speed of the object D weight of the object 9 The diagram shows a truck. Which of the following is the best position for its centre of gravity and the reason for the position? best position reason A as high as possible accelerate more rapidly B as high as possible more stable C as low as possible accelerate more rapidly D as low as possible more stable gravitational force / N mass / kg

5 10 Three forces of magnitude 14 N, 16 N and 30 N are applied on a wheel as shown. Which statement about the motion of the wheel is correct? A The wheel will move and rotate. B The wheel will move but not rotate. C The wheel will not move and not rotate. D The wheel will not move but will rotate. 11 A simple hydraulic system has two closely–fitted smooth pistons connected as shown below. What is the force F needed to balance the system? A 2.0 N B 4.0 N C 8.0 N D 16.0 N 4.0 N base area of piston 2.0 cm2 base area of piston 4.0 cm2 oil F 16 N 30 N 14 N

6 12 Two vessels S and T are filled to the same level with the same liquid. The base area of S is less than that of T. Which statement is correct? A The force on the base of S is greater than the force on the base of T. B The force on the base of S is the same as the force on the base of T. C The pressure on the base of S is greater than the pressure on the base of T. D The pressure on the base of S is the same as the pressure on the base of T. 13 An object is pulled up along a rough slope at a constant speed. Which of the following statements about the work done by the pulling force is correct? A It is equal to the gain in energy in the gravitational potential store minus the work done against friction and energy in the kinetic store. B It is equal to the gain in energy in the gravitational potential store minus the work done against friction. C It is equal to the gain in energy in the gravitational potential store plus the work done against friction. D It is equal to the gain in energy in the gravitational potential store plus the work done against friction and energy in the kinetic store. 14 In a fossil fuel power station, the fossil fuel is used to boil the water into steam. The steam is then used to turn the turbine which in turn rotates the generator. Which of the following represents the main energy transfer taking place in the power station? A chemical potential store → internal store → chemical potential store B chemical potential store → internal store → kinetic store C chemical potential store → kinetic store → internal store D kinetic store → internal store → chemical potential store S T

7 15 In a Brownian motion experiment, illuminated smoke particles are seen to move randomly. Which statement correctly explains the motion of the smoke particles? A They are continuously bombarded by the air molecules. B They are moved by the convection currents in the air. C They are shaken by the vibration of the air molecules. D They are supplied with energy by the light illuminating them. 16 A fixed mass of gas is heated in a sealed container of fixed volume. Which statement is incorrect? A The average distance between the gas molecules increases. B The average force of collision on the wall by the gas molecules increases. C The average frequency of collision of the gas molecules on the wall increases. D The average kinetic energy of the gas molecules increases. 17 Four metal cans are identical except for the colour and texture of their outer surfaces. Equal volumes of water at 100 °C are poured into each can. In which can is the rate of temperature drop the fastest? A B C D black, rough surface black, shiny surface white, smooth surface white, rough surface

8 18 A teacher has a large tank of water, a heater and an ice block. He wants to set up a convection current in