Sec 4 Science Physics SA2 2018 Kranji

, Name: ______________________ ( ) Class: _____ Centre Number: Index Number: KRANJI SECONDARY SCHOOL Preliminary Examination Secondary 4 Express / 5 Normal Academic SCIENCE (PHYSICS/CHEMISTRY) 5076/01 Paper 1 Multiple Choice Monday 27 August 2018 1 hour KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECO NDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI S ECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI S ECONDARY KRANJI SECONDARY KRANJI SECONDARY KRANJI SECONDARY READ THESE INSTRUCTIONS FIRST Write your Centre number, index number and name on all the work you hand in. Do not use staples, paper clips, highlighters, glue or correction fluid. INSTRUCTIONS TO CANDIDATES 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 to be correct and record your choice in soft pencil on the OMR provided. INFORMATION FOR CANDIDATES 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. Take the acceleration due to gravity, g, to be 10 m/s2. A copy of the Data Sheet is printed on page 14. A copy of the Periodic Table is printed on page 15. Set by : Mr Guay Hansen / Mr Go Jun Hong This question paper consists of 15 printed pages. [Turn over 4E/5NA www.KiasuExamPaper.com 115

2 1 A micrometer is used to measure the diameter of a brass rod and its reading is shown in the diagram below. What is the diameter of the brass rod? A 2.30 mm B 2.80 mm C 5.30 mm D 5.80 mm 2 The time taken for a pendulum to swing from its lowest p osition, P, to position Q of its maximum displacement is 0.30 s. How many complete periods of the pendulum are there in two minutes? A 50 B 100 C 200 D 400 3 On Earth, a ball is dropped and falls 2.0 m in a vacuum. The acceleration of the ball at 1.0 m is 10 m/s2. What is the acceleration of the ball at 0.5 m? A 5.0 m/s2 B 10 m/s2 C 15 m/s2 D 20 m/s2 P Q www.KiasuExamPaper.com 116

3 4 A boat is travelling at a uniform speed in a straight line across the surface of a lake. Which statement about the boat is correct? A The resultant force on the boat is in the direction of motion. B The resultant force on the boat is in the opposite direction to its motion. C The resultant force is greater than the resistive force between the boat and the water. D The resultant force on the boat is zero. 5 Two students are in a lift that is accelerating upwards. The total mass of the 2 students and the lift is 400 kg. The tension in the lift cable is 5000 N. What is the acceleration of the lift? A 2.5 m/s2 B 11.5 m/s2 C 12.5 m/s2 D 22.5 m/s2 6 The diagram shows a box which is balanced at the edge of a tabl e. The box is just about to fall over. Which point is most likely the centre of gravity of the box? 7 A dish of liquid is left on a laboratory bench. Some of the liquid evaporates. What happens and why? A The liquid cools because liquid molecules have more potential energy than gas molecules. B The liquid cools because faster-moving molecules escape. C The liquid warms because liquid molecules have less potential energy than gas molecules. D The liquid warms because slower-moving molecules are left behind. lift lift cable table A B C D www.KiasuExamPaper.com 117

4 8 The diagram shows a 500 g box of dimensions 6.0 cm × 8.0 cm × 4.0 cm. The box rests on a flat horizontal surface. What is the maximum pressure the box can exert on the surface it rests on? A 0.104 N/cm2 B 0.208 N/cm2 C 10.4 N/cm2 D 20.8 N/cm2 9 A student of mass 60 kg climbs some steps. He travels a horizontal distance of 2.0 m and a vertical distance of 1.5 m. The gravitational field strength g is 10 N/kg. What is the work done against the force of gravity? A 90 J B 120 J C 900 J D 1200 J 10 A ball rolls down a frictionless ramp as shown. The ball has a mass of 1.5 kg. At point X, the ball has 5.0 J of kinetic energy. How much kinetic energy does the ball possess at point Y? A 5.0 J B 25 J C 30 J D 35 J X Y 2.0 m www.KiasuExamPaper.com 118

5 11 A student stands 240 m in front of a vertical, flat cliff and b angs together two pieces of wood to make a short, loud sound. A timer records the echo of the sound 1.5 seconds after the pieces of wood are banged together. Based on this result, what is the speed of sound? A 160 m/s B 320 m/s C 360 m/s D 720 m/s 12 As a sound wave travels from one medium to another, its wavelength increases. What happens to the frequency and to the speed of the sound? frequency speed A decrease decrease B decrease increase C stay constant decrease D stay constant increase 13 A sound wave in a solid is represented by a series of lines. The diagram shows compressions C and rarefactions R at one instant in time. Which of the following statements is true? A All particles on one line move in the same direction at the same time. B The direction of travel of the sound wave is parallel to the lines. C The distance between a compression and its adjacent rarefaction is a wavelength. D The pressure at R is greater than the pressure at C. 14 The circuit shown is switched on for 1.0 minute. How much charge passes through the 3.0 Ω resistor? A 2.0 C B 12 C C 120 C D 720 C 6.0 V 3.0 Ω www.KiasuExamPaper.com 119

6 15 A 6.0 V battery, three resistors and three voltmeters are connected in the circuit shown. Which of the following are possible readings of voltmeter 1, 2 and 3? voltmeter 1 voltmeter 2 voltmeter 3 A 2.0 V 2.0 V 2.0 V B 2.0 V 2.0 V 4.0 V C 2.0 V 4.0 V 6.0 V D 6.0 V 6.0 V 6.0 V 16 A piece of wire has a resistance of 16 Ω. The wire is 20 cm long and has a cross-sectional area of 2.0 mm2. Which wire of the same material has a resistance of 8.0 Ω? length / cm cross-sectional area / mm 2 A 10 1.0 B 10 4.0 C 20 1.0 D 20 4.0 www.KiasuExamPaper.com 120

7 17 The diagram shows the circuit for a hair-dryer. The fan motor has a power rating of 0.10 kW and the heaters each have a rating of 0.40 kW. The cost of electricity is 8.0 cents per kWh. What is the cost of running the hair-dryer for two hours with switches P and Q closed and switch R open? A 1.6 cents B 4.0 cents C 6.4 cents D 8.0 cents 18 Each wire inside a cable leading from an electric socket to a h airdryer is covered with a plastic coating. This plastic coating splits and the two wires inside the cable touch each other. What could happen because of this? A An appliance plugged into a different socket could become switched on. B The hairdryer plugged into the socket could be damaged. C A person near the hairdryer could receive an electric shock. D The circuit breaker could trip. heater heater www.KiasuExamPaper.com 121

8 19 A train of steel nails and a train of iron nails hang from a strong magnet. The trains are then carefully removed from the magnet. What happens to the trains? A Both trains fall apart. B Both trains stay together. C Only the train of iron nails falls apart. D Only the train of steel nails falls apart. 20 The diagram shows a wire XY lying between the poles of a magnet. The ends of the wire are connected to a battery. The wire experience a force and moves. In which direction does the wire move? D www.KiasuExamPaper.com 122

Name: _____________________________ ( ) Class: _______ Centre Number: _________ Index Number: _________ KRANJI SECONDARY SCHOOL Preliminary Examination 2 Secondary 4 Express / 5 Normal Academic SCIENCE (PHYSICS) Paper 2 5076/02 Tuesday 21 Aug 2018 1 hour 15 minutes KRANJI SECO