NV 2025 Phy P2 3E EOY

NORTH VISTA SECONDARY SCHOOL End-of-Year Examination 2025 Secondary 3 Express __________________________________________________________________________ PHYSICS 6091/02 Paper 2 Theory Candidates answer on the Question Paper. 29 September 2025 1 hour 45 minutes No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your full name, register number and class on all the work you hand in. 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 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. CANDIDATE NAME CLASS INDEX NUMBER This document consists of 19 printed pages. [ Turn over 80

2 SECTION A Answer all the questions. 1 (a) Complete Table 1.1. Give the missing prefix, symbols and value. Table 1.1 prefix symbol value mega M 106 micro 10-6 10-9 tera [3] (b) Force is a vector quantity. State one other example of a vector quantity. ....................................................................................................................................... [1] (c) Fig. 1.1 shows an oil rig being towed by two tugs A and B. The rig is moving at constant speed. Fig. 1.1 Each tug exerts a force of 6000kN. oil rig tug A tug B 50°

3 (i) By drawing a vector diagram, determine the size of the resultant force on the rig due to the tugs. resultant force = ………………… [3] (ii) State the resistive force acting on the rig. resistive force = ………………… [1] [Total: 8]

4 2 A model rocket is launched vertically upwards from rest. The rocket reaches a velocity of 41m/s, at which the fuel is used up. Fig. 2.1 shows the velocity-time graph for the motion of the rocket from its launch until it returns to Earth. Fig. 2.1 (a) Draw a line to join each region on the graph to the description of the motion of the rocket in the region. region on the graph motion of rocket [2] (b) On Fig. 2.1, mark with a letter H, the point where the rocket reaches its highest point. [1] (c) Using Fig. 2.1, calculate the maximum height reached by the rocket. maximum height = ………………………… [2] time/s 5.0 velocity m/s 0 41 9.1 −61 15.2 X Y Z X Y Z moving upwards and accelerating upwards moving upwards and accelerating downwards moving downwards and accelerating upwards moving downwards and accelerating downwards

5 (d) The weight of the rocket is 300N. Calculate the work done in launching the rocket vertically upwards to reach its maximum height. work done = ………………………… [2] [Total: 7] 3 It is commonly said that oil floats on water “because it weighs less than water”. (a) State the meaning of weight and density and hence re-write the statement correctly. …………….…………………………………………………..…………………………..…..….. ……………….…………………………………………………..………………………..…..….. ….…………………………………………………………….…………………………..…... [3] (b) (i) It was found that 2.24 × 103kg of oil had a volume of 2.80m3. Calculate the density of oil. density = ………………………… [1] (ii) Describe how the density of oil changes with temperature. Explain how changes in density of oil can lead to convection currents. .……………….…………………………………………………………………………… .……………….…………………………………………………………………………… …...….…………………………...……………………………………………………. [2]

6 (c) Fig. 3.1 shows a bottle containing air, oil and water. Fig. 3.1 More water is added to the bottle. This affects the centre of gravity of the bottle and its content. State and explain how the stability of the bottle will change. .……………….……………………………………………………………………………...…… …...….…………………………...………………………………………………………….... [2] [Total: 8] 4 The atmospheric pressure in the laboratory is 760mmHg. (a) Fig. 4.1 shows a mercury barometer tube in the laboratory. Fig. 4.1 Determine the pressure at (i) A ….…………………………...………………………………...………………..……... [1] (ii) B ….…………………………...………………………………...……………..………... [1] A B oil water air 920mm 320mm 160mm 0mm

7 (b) Fig. 4.2 shows a mercury manometer connected to a gas supply in the same laboratory. The difference between the mercury levels is 80mm. Density of mercury is 13600kg/m3 and gravitational field strength is 10N/kg. Fig. 4.2 (i) Calculate the gas pressure, in Pa. gas pressure = ………………………… [2] (ii) On Fig. 4.2, mark with a letter X on the manometer to indicate a point where the pressure is the highest. [1] (iii) Suggest and explain one change to the manometer that will allow it to measure a smaller change in gas pressure. .……………….…………………………………………………………………………… .……………….…………………………………………………………………………… …...….…………………………...……………………………………………………. [2] [Total: 7] gas supply 80mm mercury

8 5 (a) State the principle of moments. …………….…………………………………………………..…………………………..…..….. ……………….…………………………………………………..………………………..…..….. ….…………………………………………………………….…………………………..…... [2] (b) The threaded stopper of some gas cylinders is tightened and loosened by means of a long bar fitted with two pegs as shown in Fig. 5.1. The pegs fit into two holes drilled partially into the top of the stopper. Fig. 5.1 (i) Fig. 5.2 gives the top view and side view of the bar. The distance between the pegs is 7.0cm and the minimum force to unscrew the stopper is 220N when the force is applied 28.0cm from peg B. Fig. 5.2 On the top view of the bar shown in Fig. 5.2 , draw arrows to represent all the horizontal forces acting on the bar when it is being used to turn the stopper in a clockwise direction. [2] (ii) Calculate the moment of 220N about peg B. moment = …………………… [1] threaded stopper gas cylinder long bar with two pegs 7.0cm 28.0cm top view of bar side view of bar 220N top view of stopper peg A peg B

9 (iii) Hence, or otherwise, calculate the force exerted on each peg. force on peg A = …………………… [1] force on peg B = …………………… [1] [Total: 7]

10 6 A student pours a cup of hot Milo at 90°C into a ceramic mug and places a metal spoon inside, as shown in Fig. 6.1. After a few minutes, he notices that the handle of the spoon feels hot. Fig. 6.1 (a) Thermal conduction occurs in the metal from which the spoon is made. By referring to particles, describe the process of thermal conduction in a metal. ……………….……………………………………………………………………………..…..… ……………….……………………………………………………………………………..…..… ……………….……………………………………………………………………………..…..… ….……………………………………………………………………………………………... [2] (b) The student then places a plastic lid on the mug. Explain how this action helps to keep the Milo hot longer. ……………….……………………………………………………………………………..…..… ……………….……………………………………………………………………………..…..…