2025 CHIJ 4E5N SciPhy Prelim P2

CONVENT OF THE HOLY INFANT JESUS SECONDARY Preliminary Examination in preparation for the General Certificate of Education Ordinary Level 2025 CANDIDATE NAME CLASS REGISTER NUMBER SCIENCE (PHYSICS) Paper 2 Physics Candidates answer on the Question Paper. No additional Materials are required. 5086/02 2 Sept 2025 1 hour 15 minutes READ THESE INSTRUCTIONS FIRST Write your class, register number and name on the work you hand in. You may use an HB pencil for any diagrams, graphs, tables or rough working. Write in dark blue or black pen. Do not use staples, paper clips, glue or correction fluid. The use of an approved scientific calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. Section A Answer all questions. Write your answers in the spaces provided on the question paper. Section B Answer one question. Write your answers in the spaces provided on the question paper. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 18 printed pages and 2 blank pages. [Turn over

CHIJSec/2025/OLevelPrelim/5086/02 2 Section A Answer all the questions in the spaces provided. 1 Fig.1.1 shows part of the speed-time graph for a rocket as it leaves the ground and travels into space. Fig. 1.1 (a) Define acceleration. ……………………………………………………………………………………………………... ………………………………………………………………………………………………. [1] (b) Describe the motion of the rocket: (i) from O to A ………………………………………………………………………………………. [1] (ii) from A to B …………………………………………………………………… ……………………. [1] (c) Find the resultant force acting on the rocket from A to B. Assume the average mass of the rocket from A to B is 7.4 x 106 kg. resultant force = ………………………. N [2] [Total: 5] A B ݀݁݁݌ݏ ݉/ݏ time/s

3 [Turn over CHIJSec/2025/OLevelPrelim/5086/02 2 A girl is cycling along a straight horizontal road. Fig. 2.1 shows the directions of the forces acting on the cyclist as she cycles in the direction of force C. F Fig. 2.1 (a) State which force shows the direction of the force due to air resistance. ………………………………………………………………………….……… [1] (b) Force A changes and becomes larger than force C State any effect this change has on the motion of the cyclist. …………………………………………………………………………………... [1] (c) (i) The total mass of the girl and the bicycle is 70 kg and it is travelling with a constant speed of 11.0 m/s. The cyclist then slows down until it comes to rest. Calculate the work done to make the bicycle come to rest. work done = …………………… [2] unit = ……………. [1] (ii) State the main transfer of energy that takes place between energy stores when the cyclist slows down until it comes to a rest. …………………………………………………………………………………………… [1] [Total: 6] force B force C force A force D

CHIJSec/2025/OLevelPrelim/5086/02 4 3 Fig. 3.1 shows the simple structure of a small hydroelectric power station. The useful transfer of energy between energy stores occurring at each stage are as follows: (a) State what are X and Y. X ………………………………………………………………. Y ………………………………………………………………. [2] (b) The hydroelectric power station is used for one hour. During the hour, the volume of water in the upper lake is 10 000 m3 and it is 50 m above the turbine. No additional water enters the lake. The density of water is 1000 kg/m3. Calculate the loss in energy by the gravitational potential store in one hour. potential energy loss = ……………………. J [2] [Total: 4] Fig. 3.1 Turbine & Electrical generator Lower Lake Upper Lake 50 m store of water in the upper lake store of water entering turbine kinetic store of rotating turbine and generator X Y

5 [Turn over CHIJSec/2025/OLevelPrelim/5086/02 4 Fig. 4.1 shows a wood burner in a cabin. The wood burner keeps the inside of the cabin warm when it is cold outside. Fig. 4.1 (a) Explain how thermal energy from the wood burner warms the cabin by convection. Use the ideas about the density of air. You may draw on Fig. 4.1 as part of your answer. ……………………………………………………………………………………………………... ……………………………………………………………………………………………………... ……………………………………………………………………………………………………... ………………………………………………………………………………………………… [3] (b) The outer surface of the chimney is dull and black. Explain how the dull black surface helps to warm the cabin. ……………….…………………………………………………………………………………….. …………………….…………………………………………………………………………….[2] [Total: 5] chimney shiny foil wood burner

CHIJSec/2025/OLevelPrelim/5086/02 6 5 (a) Describe how a longitudinal wave differs from a transverse wave. ……………………………………………………………………………………………………... ………………………………………………………………………………………………… …... …………………………………………………………………………………………………. [1] (b) Fig. 5.1 represents a seismic wave produced by an earthquake. Fig. 5.1 (i) The wave represented in Fig. 5.1 has a wavelength of 1.2 x 104 m. Calculate the actual distance between point J and point K. distance = …………………………….. km [2] (ii) The wave in (i) travels through the ground at a speed of 4800 m/s. As the wave passes a certain point, the ground completes 5 oscillations. Calculate the frequency of the wave and the time it takes for the wave to complete 5 oscillations. frequency = …………………. Hz [1] time = …………………….. s [ 1] [Total: 5] J K

7 [Turn over CHIJSec/2025/OLevelPrelim/5086/02 6 A microphone is connected to an oscilloscope as shown in Fig. 6.1 below. When three different sounds, A, B and C are made in front of the microphone, these are the waveforms seen on the screen of the oscilloscope are shown in Fig. 6.1. Fig. 6.1 (a) Comparing sounds A and B, explain how the sounds are different. ………………………………………………………………………………………………… …... …………………………………………………………………………………………………..[1] (b) Comparing sounds A and C, explain how the sounds are different. ………………………………………………………………………………………………… …... …………………………………………………………………………………………………..[1] [Total: 2] A B C

CHIJSec/2025/OLevelPrelim/5086/02 8 7 Fig. 7.1 shows a ray of monochromatic light incident on an interface of air and corn oil at an angle of 35°. The ray is transmitted through parallel layers of corn oil and glycerol and is then reflected from the surface of a plane mirror, located below and parallel to the glycerol layer. The ray then emerges from the corn oil back into the air at point P. The refractive index of corn oil is 1.47.