CCHM 2026 Physics P2 QP + MS

[Turn over Name: Class: Class Register Number: PRELIMINARY EXAMINATION 2026 SECONDARY 4 PHYSICS 6091/02 Paper 2 27 August 2026 1 hour 45 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your name, class and class register number clearly in the spaces provided at the top of this page. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. 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 workings 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 This document consists of 22 printed pages and 2 blank pages.

2 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 Section A Answer all questions. 1 Fig. 1.1 shows a kite flying in a steady wind. Fig. 1.1 Figs. 1.2 and 1.3 are side views of the same kite. (a) In Fig. 1.2, the kite is flying with the string attached. The kite is in equilibrium. Fig. 1.2 By drawing labelled force vectors on Fig. 1.2, show the approximate direction of the force of the wind on the kite. [3]

3 [Turn over 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 (b) In Fig. 1.3, the string has become detached. Fig. 1.3 Explain why, without the pull of the string, the kite in Fig. 1.3 cannot be in equilibrium. You may use Fig. 1.3 to illustrate your answer. ..….……………………………………………………………………………………………......... ..….……………………………………………………………………………………………......... ..….…………………………………………………………………………………………….... [1] [Total: 4]

4 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 2 A spacecraft in deep space uses jets of hot gas from its thrusters to change its velocity. Fig. 2.1 shows a side view of the spacecraft and some of its thrusters. Fig. 2.1 (not to scale) Thruster A is a distance of 1.6 m leftwards from the centre of gravity of the spacecraft. Thruster C is a distance of 0.40 m upwards from the centre of gravity of the spacecraft. Thrusters A and B can produce forces on the spacecraft in the upwards direction only. Thruster C can produce a force on the spacecraft in the leftwards direction only. All the thrusters shown produce forces entirely in the same plane as the centre of gravity. (a) Thruster A is activated, producing a force of 60 N upwards on the spacecraft. Thruster C is also activated, producing a force of 220 N in the leftwards direction on the spacecraft. Calculate the resultant moment due to these forces about the centre of gravity. resultant moment = ...................................................... [2]

5 [Turn over 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 (b) Thrusters A and C are now switched off and the spacecraft is stationary. Thruster B is activated at time t1, producing a constant force on the spacecraft until the fuel runs out at time t2. As the fuel is used, the total mass of the spacecraft decreases. On Fig. 2.2, sketch the variation of speed of the spacecraft with time from t1 to t2. Fig. 2.2 [2] (c) The spacecraft now splits apart into a carrier and a payload as shown in Fig. 2.3. Fig. 2.3 During the split, an average force of 5500 N acts on the payload for a time of 0.36 s. The velocity of the payload increases by 8.5 m/s in the upwards direction. Calculate the mass of the payload. mass = ...................................................... [2] [Total: 6]

6 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 3 In a factory, an electric motor is used to lift the boxes shown in Fig. 3.1. Fig. 3.1 The boxes are placed in a cage and the motor winds a cable around a cylinder to lift the cage and boxes. The total mass of the boxes is 37 kg and they are lifted vertically through 13 m to a storage area. The gravitational field strength of the Earth is 10 N/kg. (a) Calculate: (i) the total weight of the boxes weight = ...................................................... [1] (ii) the useful work done in lifting the boxes to the storage area. useful work done = ...................................................... [2]

7 [Turn over 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 (b) The e.m.f. of the power supply for the motor is 230 V. The current in the motor is 5.6 A. It takes 11 s for the motor to lift the cage and boxes to the storage area. Calculate the total energy transferred electrically to the motor in 11 s. energy = ...................................................... [2] (c) Some of the energy transferred by the motor during the lifting process is not transferred usefully. State two reasons why the efficiency of the lifting process is less than 100%. 1 ..….……………………………………………………………………………………………...... ..….……………………………………………………………………………………………......... 2 ..….……………………………………………………………………………………………...... ..….……………………………………………………………………………………………......... [2] [Total: 7]

8 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 4 The microwave region is one region of the electromagnetic spectrum. (a) Fig. 4.1 represents the electromagnetic spectrum divided into the seven main regions. Fig. 4.1 The regions are arranged from left to right in order of increasing wavelength. On Fig. 4.1: • indicate the microwave region by marking it with the letter M • indicate the ultraviolet region by marking it with the letters UV. [1] (b) The frequency used by microwave ovens is 2.5 GHz. (i) The speed of microwaves in air is 3.0 × 108 m/s. Calculate the wavelength of these microwaves in air. wavelength = ...................................................... [2] (ii) All microwave ovens have a switch that turns the oven off when the door is opened. Suggest why it is important for a microwave oven to be switched off when the door is opened. ..….…………………………………………………………………………………………… ..….…………………………………………………………………………………………… ..….…………………………………………………………………………………………… ..….……………………………………………………………………………………….. [2]

9 [Turn over 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 (c) State and explain which wire in the microwave oven's mains cable the safety switch should be connected to. ..….……………………………………………………………………………………………......... ..….……………………………………………………………………………………………......... ..….……………………………………………………………………………………………......... ..….…………………………………………………………………………………………….... [2] [Total: 7]

10 2026 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/02 5 A student wishes to plot the V-I characteristic graph of a 12.0 V, 24.0 W tungsten filament lamp. The circuit used must enable the potential difference (p.d.) across the lamp to be varied continuously from 0 to 12.0 V. The power supply used is a 12.0 V battery. (a) On Fig. 5.1, draw an appropriate circuit that includes the power supply shown. [2] Fig. 5.1