ANDSS 2025 Physics Prelim P2 QP

This document consists of 27 printed pages. [Turn over O ANDERSON SECONDARY SCHOOL Preliminary Examination 2025 Secondary Four Express CANDIDATE NAME: CLASS: / INDEX NUMBER: PHYSICS Paper 2 Structured and Free Response Candidates answer on the Question Paper. 6091/02 20 August 2025 1 hour 45 minutes 1145-1330 h No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name, class and index number on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid/tape. Section A Answer all questions. Write your answers in the spaces provided. Section B Answer one question. Write your answers in the spaces provided. Candidates are reminded that all quantitative answers should include appropriate units. The use of an approved scientific calculator is expected, where appropriate. Candidates are advised to show all their working in a clear and orderly manner, as more marks are awarded for sound use of Physics than for correct answers. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Section A [70] Section B [10] Total [80]

2 Prelim Exam 4E PHY 2025 6091/02 Section A Answer all the questions in this section. 1 An aircraft flies at a constant height. Air drag and the force from the aircraft’s engine together produce a force on the aircraft of 50 kN due north. The wind produces a force of 20 kN at an angle of 30º to the horizontal, as shown in Fig. 1.1. Fig. 1.1 Draw a scale drawing in the space below to show the resultant force acting on the aircraft. Use your drawing to determine the size of the resultant force and the angle between the resultant force and north. resultant force = ………………………..…………… angle = ……………………………………. [3] [Total: 3] 50 kN 20 kN 30º

3 Prelim Exam 4E PHY 2025 6091/02 [Turn over 2 Fig. 2.1 shows a mobile bird sculpture that has been created by an artist. Fig. 2.1 M is the centre of gravity of the bird sculpture, including its tail. The bird sculpture is placed on a pivot. A force F is added at the end E of the tail so that the bird remains stationary in the position shown. The mass of the bird and tail is 2.2 kg. The gravitational field strength g = 10 N/kg. (a) Calculate F. F = ……………………………….[2] 11 cm F 25 cm 24 cm

4 Prelim Exam 4E PHY 2025 6091/02 (b) A counter-weight is added at E. The centre of gravity of the sculpture with counter- weight is at the pivot. The sculpture is rotated clockwise to the position shown in Fig. 2.2. It is held still, then carefully released. Fig. 2.2 State and explain why the sculpture will stay in that position. ……………..………………………………………………………………………………. ……………..………………………………………………………………………………. ……………..………………………………………………………………………………. ……………..………………………………………………………………………………. ……………..……………………………………………………………………….……[2] [Total: 4]

5 Prelim Exam 4E PHY 2025 6091/02 [Turn over 3 Fig. 3.1 shows a long vertical tube, sealed at the base and open at the other end. The tube is 1.0 m long. The cross-sectional area of the tube is 4.0 x 10–4 m2. It is filled with a liquid of density 1.6 x 104 kg/m3. The gravitational field strength is 10 N/kg. Fig. 3.1 The atmospheric pressure is 1.0 x 105 Pa. (a) (i) Calculate the total pressure in the liquid at the bottom of the tube. pressure = …………………[2] (ii) Calculate the force exerted on the inside surface of the bottom of the tube. force = …………………[1] base of cross-sectional area = 4.0 x 10-4 m2

6 Prelim Exam 4E PHY 2025 6091/02 (b) A small sheet of glass is placed over the open end of the tube. The tube is inverted in a container of a dense liquid. The open end of the tube and the sheet of glass are just below the surface of the liquid as shown in Fig. 3.2. Fig. 3.2 The sheet of glass seals the open end of the inverted tube. Describe and explain what happens to the level of liquid in the inverted tube when the sheet of glass is removed. ……………..………………………………………………………………………………. ……………..………………………………………………………………………………. ……………..………………………………………………………………………………. ……………..………………………………………………………………………………. ……………..……………………………………………………………………….……[3] [Total: 6]

7 Prelim Exam 4E PHY 2025 6091/02 [Turn over 4 Fig. 4.1 shows a conveyor belt transporting a package to a raised platform. The belt is driven by a motor. The mass of the package is 16 kg. The gravitational field strength is 10 N/kg. Fig. 4.1 (a) Calculate the increase in energy in the gravitational potential store of the package when it is raised through a vertical height of 1.8 m. energy = …………………………[1] (b) The package is raised through the vertical height of 1.8 m in 4.5 s. Calculate the power needed to raise the package. power = …………………………[1] (c) The electrical power supplied to the motor is much greater than the answer to (b). Explain how the principle of conservation of energy applies to this system. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ……………………………………………………………………………………………… ………………………………………………………………………………...………….[2] [Total: 4]

8 Prelim Exam 4E PHY 2025 6091/02 5 Fig. 5.1 shows the components of the electromagnetic spectrum in order of increasing wavelength. Fig. 5.1 (a) Name the components M and N and state one use of each component you have named. ……………………………………………………………………………………………… ……………………………………………………………………………………………… ………………………………………………………………………………...………….[2] (b) X-rays are used in the medical field to produce images of organs (e.g. bones and lungs) inside the patient’s body. However, the amount of X -rays a person is exposed to must be monitored as over-exposure may affect the health of the person. (i) State a possible effect on a person’s health due to over-exposure to X-rays. ...….………………………………………………………………………………….. ..….…………………………………………………………………..…………….[1] (ii) Explain why over-exposure to X-rays may have the effect stated in part b(i). ...….………………………………………………………………………………….. ..….…………………………………………………………………..…………….[1] [Total: 4] M N

9 Prelim Exam 4E PHY 2025 6091/02 [Turn over 6 Fig. 6.1 shows the path of a light ray in a diamond. Fig. 6.1 (a) State the meaning of the critical angle of a diamond. ..................…….………………………………………………………………………….. ...…………………………………………………………………………………..........[1] (b) (i) Calculate the refractive index of diamond. refractive index = ………………………….[2] (ii) Calculate the critical angle of diamond. critical angle = ………………………….[1] 55° P Q R 15°

10 Prelim Exam 4E PHY 2025 6091/02 (c) (i) Determine the angle of incidence at boundary PQ. angle of incidence = ………..……………………..[1] (ii) Explain how the ray will behave at boundary PQ. ....................…….…………………………………………………………………… ....................…….…………………………………………………………………… ….…………………………………………………………………………............[2] [Total: 7] 7 In a waste management plant, a thermistor circuit as show in Fig. 7.1 is used to detect the temperature of certain waste materials, such as heated food containers or metallic items that may retain heat. Fig. 7.1 (a) The electromotive force (e.m.f.) of the battery is 12 V. The switch is closed. The thermistor has