Admiralty Secondary School 2025 Physics Prelim P1 QP

This question paper consists of 19 printed pages including this cover page. ADMIRALTY SECONDARY SCHOOL SUBJECT : Physics CODE/PAPER : 6091/1 LEVEL/STREAM : Secondary 4 Express DATE : 1 Sep 2025 TIME : 0800h – 0900h 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 2025 NAME: NO: CLASS: 40

2 1 Which of the following is a suitable estimate for the average width of a human hair? A 10-2 m B 10-4 m C 10-6 m D 10-8 m 2 A pendulum makes 45 complete oscillations in 15 seconds. What is the frequency of the oscillations? A 0.333 Hz B 0.667 Hz C 3.00 Hz D 6.00 Hz 3 A car is travelling along a straight road. The table shows its speed at successive time intervals. Time/s 0 1 2 3 4 Speed/ms-1 0 3 6 9 12 Which of these statements is incorrect? A Its average velocity is 6 ms-1. B It travels a distance of 12 m in 2 s. C It travels a distance of 24 m in 4 s. D It travels with a uniform acceleration of 3 ms-2. 4 A spacecraft travels from the Earth to the Moon. At a certain point in the journey, it has zero weight. Why is the weight zero at this point? A The spacecraft leaves the Earth’s gravitational field. B The gravitational fields disappear in space. C The gravitational fields of the Earth and the Moon cancel each other. D There is no air resistance on the spacecraft.

3 5 The graph shows how weight varies with mass on planet P and on planet Q. An object weighs 400 N on planet P. The object is taken to planet Q. Which of the following is correct? mass of object on planet Q / kg weight of object on planet Q / N A 40 200 B 40 400 C 80 200 D 80 400 6 A uniform beam of weight 50 N is 3.0 m long and is supported on a pivot situated 1.0m from one end. When a load of weight W is hung from that end, the beam is in equilibrium, as shown in the diagram. What is the value of W? A 25 N B 50 N C 75 N D 100 N

4 7 27 identical small cubes are arranged in a 3 × 3 × 3 block to form a big cube. Each small cube has a density of . If one small cube is removed from the big cube, what is the density of the remaining big cube of 26 small cubes? A  B  C  D  8 Which block exerts the greatest pressure on the surface below it? area 10 cm2 area 20 cm2 area 20 cm2 A B C D area 10 cm2

5 9 The system shown in the diagram contains a liquid. A downward force of 120 N is exerted on the piston K and the liquid is displaced by 0.4 cm. What will be the upward force exerted on piston L and the distance moved by piston L? upward force on piston L distance moved by piston L A 4800N 0.01 cm B 3N 16.0 cm C 3N 0.01 cm D 4800N 16.0 cm 10 A load is to be lifted on three different lengths of ramps from ground level to a height 10 m above the ground. All the ramps are of the same material. Which path requires the most amount of work? Assume that the surface is frictionless and the load moves at constant speed. A Path X B Path Y C Path Z D Equal amount of work is done for every path 10 m

6 11 A system with an efficiency of 74 % wastes 230 W of power. What is the useful output power of the system? A 170 W B 310 W C 650 W D 880 W 12 Particles of dust, suspended in water, are viewed through a microscope. The particles can be seen to move irregularly. This movement is due to A convection currents in the water. B evaporation of the water near the dust particles. C gravitational forces acting on the particles of dust. D water molecules hitting the dust particles in a random way. 13 In terms of the kinetic particle model of matter, why does temperature increase as a liquid is heated? A The average spacing between the molecules becomes larger. B The average speed of the molecules increases. C The collision rate of molecules increases. D The interaction between the molecules becomes stronger. 14 What is the internal energy of an object? A It is the energy associated with the object’s movement through space. B It is the energy associated with the random movement of the molecules in the object. C It is the energy due to the attractions between the molecules within the object. D It is the sum of all the microscopic potential and kinetic energies of the molecules.

7 15 Four blocks of metals P, Q, R and S with equal masses are heated by identical heaters. The variations of the temperatures of the blocks with time are shown in the graph below. Which of the following shows the correct sequence of the metals in increasing order of magnitude of specific heat capacity? A P, Q, R, S B Q, R, S, P C P, S, R, Q D S, R, Q, P 16 A heater supplying energy at a constant rate of 0.5 kW is completely immersed in a large block of ice at 0 °C. In 22 minutes, 2.0 kg of water at 0 °C are produced. What is the specific latent heat of fusion of ice? A 5.5 J kg-1 B 330 J kg-1 C 5500 J kg-1 D 330 000 J kg-1 temperature time P Q R S

8 17 The diagrams show water waves in a ripple tank. The water waves move more slowly after passing into shallow water at the broken line. Which diagram correctly shows what happens to the waves? A B C D fast slow deep water shallow water fast slow deep water shallow water fast slow deep water shallow water fast slow deep water shallow water

9 20 Electromagnetic waves of wavelength λ and frequency f travel at speed c in a vacuum. Which of the following describes the wavelength and speed of electromagnetic waves of frequency f / 2? wavelength speed in a vacuum A λ / 2 c / 2 B λ / 2 c C 2λ c D 2λ 2c 18 The diagram below shows a wave on a string with two points P and Q marked. The wave is moving in the direction shown. What will happen next? A P will move up. B P will move down. C Q will move up. D Q will not move. 19 Part of the electromagnetic spectrum is shown below. radio wave P infra-red visible light What is a possible application of P? A cancer treatment B radar communication C intruder alarm D sterilisation of medical equipment P Q wave direction

10 21 Plane mirrors XY and XZ are arranged at an angle of 60° to each other. A ray of light is reflected from the plane mirror XZ with an angle of reflection of 35°, this ray was previously reflected from the plane mirror XY. What is the angle of incidence at mirror XY? A 25° B 35° C 55° D 65° 22 A light ray L enters a glass block as shown below. Given that the critical angle of the glass is 45°, which of the rays ( A, B, C or D) correctly shows the path of L when it exits the glass block? 35o 60o Y X Z L B C D A