2023 NYGH Phy Prelims P1

南洋女子中学校 NANYANG GIRLS' HIGH SCHOOL Preliminary Examination 2023 Secondary Four 'O' Level CANDIDATE NAME CENTRE NUMBER S INDEX NUMBER PHYSICS 6091/01 Paper 1 Multiple Choice 28 Aug 2023, Monday 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Centre number and index number on the Answer sheet in the spaces provided unless this has already been done for you. There are forty questions in this paper. Answer all questions. For each question there are four possible answers, A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 17 printed pages and 3 blank pages. [Turn over

2023 Preliminary Examination Secondary 4 2 Nanyang Girls’ High School Physics I 1 Which measurement represents the longest length? A 1.2 x 10-4 Mm B 1.2 x 103 km C 1.2 x 105 cm D 1.2 x 107 m 2 What is the reading shown by the micrometer screw gauge below? A 5.272 mm B 5.72 mm C 7.22 mm D 7.72 mm 3 A boat starts moving across a river at a velocity v perpendicular to the river bank. The boat encounters a current along the river of velocity u, as shown in the diagram. Which vector diagram shows the resultant velocity r of the boat? 5 30 25 20 15

2023 Preliminary Examination Secondary 4 3 Nanyang Girls’ High School Physics I [Turn over 4 Which displacement-time (s-t) graph shows a body moving at a constant velocity? A B C D 5 A car accelerates uniformly from rest at time t = 0 s along a level road. The car travels 12 m in the time between t = 1.0 s and t = 2.0 s. How far does it travel in the time between t = 3.0 s and t = 4.0 s? A 28 m B 35 m C 48 m D 64 m 6 In a experiment, a student jumps upward off a common bathroom scale as the laboratory partner records the scale reading. What does the laboratory partner observe during the instant the student pushes off? A The scale reading will remain unchanged during the entire time the student is in contact with the scale. B The scale reading will increase momentarily then will decrease during the entire time the student is in contact with the scale. C The scale reading will decrease then increase during the entire time the student is in contact with the scale. D The scale reading will decrease during the entire time the student is in contact with the scale. 0 0 0 0

2023 Preliminary Examination Secondary 4 4 Nanyang Girls’ High School Physics I 7 A student swings a toy plane in a circle on a string. What path (top view) would the toy plane take if the string suddenly breaks? A B C D

2023 Preliminary Examination Secondary 4 5 Nanyang Girls’ High School Physics I [Turn over 8 A box has an internal volume of 1000 cm 3. When a solid object is placed in the closed box, the volume of air in the box is 520 cm3. Given that the density of the solid object is 8.00 g/cm3, what is the mass of the object? A 60.0 g B 3840 g C 4160 g D 8000 g 9 A uniform rod XYZ is made up of two sections. The length of the plastic section, XY, is 4 times that of the wooden section, YZ. The rod balances at a point P such that the distance PZ that is twice the length of the wooden section. What is the ratio of the mass of the wooden section to the mass of the plastic section? A 1 : 4 B 1 : 2 C 2 : 3 D 4: 3 10 The diagram shows a balancing toy pivoting on a triangular stand. When the toy is tilted slightly, it does not topple but swings back to its original position. Which statement correctly describes this toy? A The toy is in stable equilibrium. B The toy is in neutral equilibrium. C The toy is in unstable equilibrium. D The toy is in unbalanced equilibrium. 4 units 1 unit 2 units X Y Z plastic section wooden section P air solid object

2023 Preliminary Examination Secondary 4 6 Nanyang Girls’ High School Physics I 11 A student does some simple exercises with some heavy blocks. The gravitational field strength g is 10 N / kg. In which exercise does she do the least amount of work? 12 A ball is thrown upwards and reaches a height of 0.50 m. Ignoring air resistance, how high will the same ball reach if it is thrown upwards with twice the initial speed? A 0.50 m B 1.0 m C 1.5 m D 2.0 m 13 The diagram shows a simple mercury barometer. When the atmospheric pressure increases, which distance will increase? A VW B WX C XY D YZ V W X Y Z mercury

2023 Preliminary Examination Secondary 4 7 Nanyang Girls’ High School Physics I [Turn over 14 The graph shows how the pressure exerted by a liquid varies with depth below the surface. What is the density of the liquid if the gravitational field strength is 10 N/kg ? A 600 kg/m3 B 750 kg/m3 C 1200 kg/m3 D 7500 kg/m3 15 Below are four short paragraphs describing the particles in a beaker of water at 50 C. Which paragraph correctly describes the motion of the molecules? A The particles all travel at the same speed. This speed is not large enough for any of the particles to leave the surface of the water. There are attractive forces between the particles. B The particles have a range of speeds. Some particles travel sufficiently fast to leave the surface of the water. There are no forces between the particles. C The particles have a range of speeds. Some particles travel sufficiently fast to leave the surface of the water. There are attractive forces between the particles. D The particles have a range of speeds. The fastest particles are unable to leave the surface of the water. There are attractive forces between the particles. pressure / Pa depth / m

2023 Preliminary Examination Secondary 4 8 Nanyang Girls’ High School Physics I 16 A gas in a sealed cylinder is heated. Which quantity does not increase as the gas is heated? A the average number of gas molecules hitting the cylinder walls per second B the average kinetic energy of the gas molecules C the average speed of the gas molecules D the average distance between the gas molecules 17 A student, who is perspiring profusely, stands under a ceiling fan. What is the main reason for her to feel cooler after some time? A The fan sets up a convection current around her. B The fan absorbs the heat radiated from her body at a faster rate. C The fan increases the rate of evaporation of sweat from her body. D The fan increases the rate of radiation from her body to the surroundings. 18 A thermocouple thermometer provides readings in terms of current. The current recorded by this thermometer at lower and upper fixed points are 5 mA and 25 mA respectively. When this thermometer is placed inside a cup of hot coffee, its reading is 15 mA. What is the temperature of the coffee? A 20 C B 50 C C 60 C D 75 C 19 A heater is partially immersed in water. It is found that 30 000 J has been transferred to the water in 5.0 minutes. Th