Broadrick Prelim P2

1 This question paper consists of 20 printed pages including this page. Setter: Ms Amanda de Souza [Turn over Name Class Index Number BROADRICK SECONDARY SCHOOL SECONDARY 4 EXPRESS PRELIMINARY EXAMINATION 2024 PHYSICS Paper 2 Structured and Free Response Candidates answer on the Question Paper No Additional Materials are required. 6091/02 August 2024 1 hour 45 minutes READ THESE INSTRUCTIONS FIRST Write your name, index number and class on the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams, graphs, tables or rough working. 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 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 Paper 1 /40 Paper 2 Section A /70 Section B Q ______ /10 Total /120

2 6091/2/09/22 Section A [70 marks] Answer all questions in the spaces provided. 1 (a) (i) State the difference between scalar and vector quantities. [1] (ii) Force is a vector quantity. State an example of a scalar quantity. [1] (b) Fig. 1.1 shows three weights, X, Y and Z attached to three strings that are joined at P. The strings attached to X and Z are on frictionless pulleys. The weight of Y is 4 N and the weights of X and Z are equal. In the position shown, all three weights are at rest. Fig. 1.1 In the space below, draw a labelled diagram to determine the tension in the string attached to X. tension in string attached to X = ………………………….. [3] [Total: 5] pulley X Y Z P 100°

3 6091/2/08/24 [Turn over 2 Fig. 2.1 shows the displacement-time graph of a ball falling in air from rest. Fig. 2.1 (a) Describe how the velocity of the falling ball changes in the first 2.0 s. [1] (b) Estimate the terminal velocity of the falling ball. terminal velocity = ………………………….. [2] (c) Explain, in terms of forces, how the ball reaches terminal velocity. [3] (d) On Fig. 2.1, sketch the graph of the same ball falling in another location with a higher gravitational field strength. [1] [Total: 7] displacement / m time / s

4 6091/2/08/24 3 Fig. 3.1 shows an axle X fixed onto wheel Y so that both can rotate together. A load of 500 N is hanging on a rope wound around axle X while another rope is wound around wheel Y. The radii for the axle and the wheel are 30 cm and 90 cm respectively. Fig. 3.1 (a) Assuming that there are no frictional forces, determine the horizontal force in the rope on wheel Y such that the load moves up at constant speed. force = ………………………….. [2] (b) Explain the effect on the force calculated in (a) if the radius of wheel Y is increased while the radius of the axle X does not change. [2] (c) An electric motor rated 0.1 kW is attached to the rope on wheel Y which pulls the rope to the right with a constant force. The load moves up at a constant speed. If 40% of the input energy is transferred to the internal store of the surroundings as heat and sound, find the gain in height of the load after 10 s. gain in height = ………………………….. [2] [Total: 6] X Y 30 cm 90 cm 500 N F

5 6091/2/08/24 [Turn over 4 Fig. 4.1 shows two syringes that are filled with liquid and enclosed by two frictionless pistons. Fig. 4.1 One end of the syringe is connected to a manometer. The cross-sectional areas of piston A and piston B are 4 x 10-4 m2 and 6 x 10-5 m2 respectively. When a force F acts on piston A, the liquid exerts a force of 9.0 N on piston B. The atmospheric pressure is 1.0 x 105 Pa. (a) Determine the force F acting on piston A. force = ………………………….. [2] (b) Given that the density of mercury is 13 600 kg / m3 and the gravitational field strength is 10 N / kg, determine the difference in mercury levels of the manometer. difference in mercury level = ………………………….. [2] (c) State how your answer to (b) will be different if the following modifications were made: (i) the manometer tube is replaced with another tube of larger cross-sectional area, [1] (ii) mercury is replaced with glycerine of density 1259 kg / m3. [1] [Total: 6] F piston A liquid mercury piston B air

6 6091/2/08/24 5 Fig. 5.1 shows an experiment used to determine a value for the specific latent heat of vaporisation of water. Fig. 5.1 (a) In the experiment, the immersion heater supplies 480 J / s. He closes the switch for 2 minutes and 0.025 kg of boiling water is vaporised. (i) Calculate a value for the latent heat of vaporisation of water. latent heat of vaporisation of water = ………………………….. [2] (ii) State and explain whether the answer in (a)(i) is larger or smaller than the true value of the latent heat of vaporisation of water. [2] voltage supply switch V A boiling water immersion heater

7 6091/2/08/24 [Turn over (b) In Fig. 5.2, another student conducting the same experiment inserts a thermometer into the boiling water at the start of the experiment to ensure that the temperature remains at 100 °C throughout the experiment. Fig. 5.2 (i) Explain why the temperature remains at 100 °C throughout the experiment. [2] (ii) Table 5.3 shows some data from the experiment. Initial temperature of thermometer 30 °C Final temperature of thermometer 100 °C Heat capacity of thermometer 28.5 J / K Table 5.3 Given that the same immersion heater is used for the same duration of 2 minutes, use your answer in (a)(i) to calculate the mass of boiling water that is boiled off in Fig. 5.2. mass = ………………………….. [2] [Total: 8] voltage supply switch immersion heater boiling water mercury-in-glass thermometer A V

8 6091/2/08/24 6 A transverse wave travelling from left to right is set up along a rope as shown in Fig. 6.1 Fig. 6.1 (a) Explain what is meant by a transverse wave. [1] (b) On Fig. 6.1, indicate one amplitude of the wave and label it A. [1] (c) Fig. 6.2 and Fig. 6.3 are the displacement-time graphs of two points P and Q on the rope over the same period of time. Fig. 6.2 Fig. 6.3 (i) Determine the frequency of the wave. frequency = ………………………….. [1] (ii) Point Q is 20 cm to the right of point P. Determine the longest possible wavelength for this wave. wavelength = ………………………….. [1] (iii) Explain why th