Fuchun Sec 2022 4NA Science Physics Prelim Paper 2

READ THESE INSTRUCTIONS FIRST Write your Centre number, index number, name and class on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all questions in Section A and any two questions in Section B. The use of an approved scientific calculator is expected, where appropriate. In calculations, you should show all the steps in your working, giving your answer at each stage. You are advised to spend no longer than 30 minutes on Paper 1. You may proceed to answer Paper 2 as soon as you have completed Paper 1. At the end of the examination hand in your answers to Paper 1 and Paper 2 separately. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Section A /14 Section B /16 TOTAL /30 Setter: Mr LH Liang This document consists of 12 printed pages and no blank page. FUCHUN SECONDARY SCHOOL PRELIMINARY EXAMINATION 2022 SECONDARY FOUR NORMAL (ACADEMIC) CANDIDATE NAME CLASS CENTRE NUMBER S INDEX NUMBER SCIENCE Paper 2 Physics 5105/02 01 August 2022 Papers 1 and 2: 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required.

FCSS S4N/Sc(Physics)/Prelim/2022 2 Section A Answer all the questions in the spaces provided. 1 The table gives details of some units of energy. Complete the table by filling in the blank spaces. unit symbol multiple of the SI unit (J) joule J 1 kilojoule kJ gigajoule 1 000 000 000 mJ 0.001 [2] 2 The diagram below shows the location of the centre of gravity of a man when he assumes different positions 1, 2 and 3. Position 1 2 3 (a) Which of positions, 1, 2 or 3, is the most stable? position ……………………. [1] (b) Explain your answer to (a). …………………………………………………………………………………………………….. ……………………………………………………………………………………………… [1]

FCSS S4N/Sc(Physics)/Prelim/2022 3 3 A cyclist applies a vertical force F of 110 N on a pedal of his bicycle as shown. As he travels along, the pedal moves through a circle of radius 8 cm. For a pedal in the position shown, the line of action of force F, is 5.0 cm from the pivot. (a) Calculate the moment of force, F, about the pivot, at that instant. moment = ……………………. Ncm [1] (b) The pedal moves from position A to position B as shown in the figure. Explain why the force applied at A will have a different effect from the same force applied at B. ..……..………….….………...…………………………………………………………………… ……..………….….………...………………………………………………………………. [1]

FCSS S4N/Sc(Physics)/Prelim/2022 4 4 A vibrating bar is positioned so that it touches the surface of the water in a ripple tank. The lines on the diagram represents troughs of the wave produced. (a) Explain why each trough is also a wavefront. ..……..………….….………...…………………………………………………………………… ……….………...…………………………………………………………………………… [1] (b) Calculate the wavelength produced by the vibrating bar. wavelength = ……………………. cm [1] (c) The wave took 6 seconds to travel from position T to Z. Calculate the period of the wave. period = ……………………. s [1] 12 cm

FCSS S4N/Sc(Physics)/Prelim/2022 5 5 A student carries out an experiment to study the relationship between the potential difference across a lamp and the current flowing through the lamp. The student uses the circuit shown. The potential difference across the lamp is varied using the rheostat, and the values for current and potential difference are shown in the table. V / V 0.0 1.0 2.0 3.0 4.0 5.0 I / A 0.00 0.30 0.50 0.62 0.70 0.74 A V

FCSS S4N/Sc(Physics)/Prelim/2022 6 (a) Plot a graph of these results marking each point with a cross (x). Draw a best-fit curve taking into account all plotted points. [2] (b) State the value of current when the potential difference is 1.5 V current = ……………………. A [1] (c) What can you conclude from the shape of your graph? …………………………………………………………………………………………………….. …………………………………………………………………………………………………….. ……………………………………………………………………………………………… [2]

FCSS S4N/Sc(Physics)/Prelim/2022 7 Section B Answer any two questions from this section in the spaces provided. 6 (a) Sailors use echo sounding equipment to measure the depth of water beneath their ships. The ship emits a pulse of sound waves, and after 0.5 seconds, the ship receives an echo of the sound pulse from the sea bed. The speed of sound in sea water is 1500 m/s. Calculate the distance the ship is above the sea bed. distance above the sea bed = ……………………. m [2] (b) State two differences to the echo as the ship moves over the sea cliff. …………………………………………………………………………………………………….. …………………………………………………………………………………………………….. ……………………………………………………………………………………………… [2] sea bed ship sea cliff

FCSS S4N/Sc(Physics)/Prelim/2022 8 (c) Two climbers climb up a cliff as shown. Both climbers start from the same starting point and climb up the same height. The cliff is 50 m high. Climber A has a mass of 50 kg and Climber B has a mass of 60 kg. Both climbers climb to the top of the cliff. (i) Which climber, A or B, has done more work? climber ……………………. [1] Explain your answer. ................................................................................................................................ ………………………………………………………………………………………. [1] (ii) Calculate the gravitational potential energy of climber A when he reaches the top of the cliff. [g = 10 N/kg] gravitational potential energy = ……………………. J [2] climber A climber B 50 m

FCSS S4N/Sc(Physics)/Prelim/2022 9 7 (a) Two forces, 20 N and 15 N, act on a 2 kg box along a smooth surface as shown. (i) State the magnitude and direction of the resultant force acting on the box. magnitude = ……………………. N [1] direction ……………………. [1] (ii) Calculate the acceleration of the box. acceleration = ……………………. m/s2 [2] 2 kg 15 N 20 N

FCSS S4N/Sc(Physics)/Prelim/2022 10 (b) The diagram shows two similar flasks. One has a dull black surface and the other has a shiny silver surface. The flasks are filled with equal volumes of water. A lid, with thermometer, is placed on each flask. The flasks are placed the same distance from an electric heater. The initial temperature of the water in each can is the same. (i) Name the process by which energy from the electric heater reaches the flasks. ……………………………………………………………….......…………………. [1] (ii) The temperature of the water in both flasks rises. Which flask, A or B, will the temperature rise more quickly? ……………………. [1] Explain your answer. …………………………………………………………………………………………….. ……………………………………………………………………………………… [1] (iii) State one difference between boiling and evaporation. …………………………………………………………………………………………….. ……………………………………………………………………………………… [1] thermometer thermometer shiny silver surface dull black surface electric heater flask A flask B