2024 CWSS P1 P2 QP + MS

COMMONWEALTH SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 SECONDARY 4 EXPRESS PHYSICS Name: ________________________________________( ) Class: ___________ Physics 6091/01 Paper 1 Multiple Choice 23 August 2024 Additional Materials: Multiple Choice Answer Sheet 1130 h – 1230h 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, index number and class on the Answer Sheet in the spaces. 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 answer in soft pencil on the separate answer sheet. 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. Name of setter: Mdm Quek Lay Hong This booklet consists of 18 printed pages including the cover page. [Turn over

2 1 Which order shows units of energy in the correct order of increasing size? A J → kJ → mJ → nJ B mJ → nJ → J → kJ C nJ → mJ → J → kJ D MJ → J → kJ → GJ 2 A car travels at constant speed around a curved road. Which of the following statements about the motion of the car is not correct? A The car is accelerating. B The displacement of the car increases. C The distance travelled per unit time by the car is constant. D The velocity of the car is uniform. A 12 m B 29 m C 34 m D 58 m A 250 N B 900 N C 2100 N D 15000 N 3 A race car is designed to change its high speed very quickly when racing on a track. It can slow down at a deceleration of 20 m/s2. What is its displacement as it comes to a stop in 1.7 s? 4 A van of mass 1 500 kg is moving along a level road with an acceleration of 0.60 m/s2. The force produced by the engine is 1150 N. What is the frictional force between the tyres and the road?

3 5 A car of mass 500 kg has an engine with a power output of 6 .0 kW. The car takes 10 minutes to travel up a slope of vertical height 500 m. Air resistance and friction are negligible. The gravitational field strength g = 10 N/kg. What is the amount of energy in the kinetic store of the car when the car reaches the top of the hill? A 1.1 x 106 J B 2.5 x 106 J C 3.6 x 106 J D 6.1 x 106 J 6 Two blocks are connected by a light string. They move over a frictionless floor with a uniform acceleration of 1.0 m/s2 under the action of a constant force F. What will the acceleration of the 1.0 kg block be if the string breaks? A 0 m/s2 B 1.0 m/s2 C 2.0 m/s2 D 3.0 m/s2 7 A clown riding a unicycle is accelerating up an inclined plane as shown in the diagram. In which direction is the friction acting on the wheel of the unicycle? A B C D

4 8 A boat with velocity v travels across the river perpendicular to the river bank. The water in the river is flowing with a velocity u as shown. Which vector diagram correctly represents the resultant velocity r of the boat? A B C D 9 The diagram shows a tea spoon and a table spoon that are made of pure silver. Which of the following statements is correct about the densities of the two types of spoons? A The density of the tea spoon is greater than the density of the table spoon. B The density of the tea spoon is less than the density of the table spoon. C The densities of the tea spoon and the table spoon are the same. D The densities cannot be compared as information about the volume is not given.

5 10 A bus on a ramp is undergoing a stability test. The diagram shows the maximum angle of inclination for the bus. Which position is likely to be its centre of gravity? 11 A sealed U-tube contains nitrogen in one arm and helium at pressure P in the other arm. The gases are separated by mercury of density . The acceleration of free fall is g. What is the pressure of nitrogen? A P B x g C P - x g D P + x g Helium at pressure P Nitrogen x y

6 12 The diagram shows a man of mass 50 kg standing at the end of a diving board. The diving board is uniform with a mass of 10 kg. It is 3.0 m long and is pivoted at points P and Q. The gravitational field strength g = 10 N/kg. Which would be the correct magnitude and direction for the forces at P and Q on the diving board? P Q A 950 N down 1 550 N up B 1 050 N down 1 650 N up C 950 N up 1 550 N down D 1 000 N up 1 600 N down 13 A parachutist opens his parachute and falls to Earth at constant speed. What is the principal energy transfer taking place as he falls? A kinetic store to gravitational potential store of energy B kinetic store to internal store of energy C gravitational potential store to kinetic store of energy D gravitational potential store to internal store of energy 1.0 m 2.0 m P Q diving board

7 14 The diagram shows a simple model of a liquid. When a force pushes down on the marbles, the marbles push the sides and bottom of the container outwards. What can be concluded from this model? A Liquid particles are in constant and random motion. B Liquid particles move faster under pressure. C Pressure acts in all directions in a liquid. D Pressure decreases the distance between the liquid particles. 15 10 g of ice-cubes at 0 C is added to 100 g of water at 30 C. Specific heat capacity of water is 4.2 J/ (gC) and specific latent heat of fusion of ice is 334 J/g. What is the final temperature of the water? A 15 °C B 20 °C C 22 °C D 27 °C 16 Which of the following increases when a liquid becomes a gas at its boiling point? A the average kinetic energy of the molecules B the molecular size C the molecular spacing D the total number of molecules

8 17 The outlet of a glass syringe is sealed so that air is trapped below the piston. Which of the following explains why the piston begins to rise when the syringe is placed in hot water? A Convection is occurring inside the syringe. B The glass is expanding. C The molecules of trapped air are getting bigger. D The trapped air molecules are hitting the piston more often. 18 Which statement describes what happens when sulfur solidifies? A There is a transfer of energy and a change in temperature. B There is a transfer of energy but no change in temperature. C There is no transfer of energy and no change in temperature. D There is no transfer of energy but there is a change in temperature. 19 An electric heater of power 1.0 kW is immersed in 2.0 kg of water for 4.0 minutes. The initial temperature of the water is 20oC. The specific heat capacity of water = 4 200 J/(kgoC). What is its final temperature at the end of 4 minutes? A 23 oC B 29 oC C 49 oC D 51 oC

9 20 In the diagram, two persons P and Q stood in front of a vertical cliff. P fired a pistol. The time for the sound to travel directly from P to Q is t1 seconds and the time for the echo to reach Q is t2 seconds, both times measured from the instant the pistol was fired. The speed of sound is 340 m/s. What is value of t2 – t1? A 0.5 s B 1.0 s C 2.0 s D 2.5 s 21 The diagram shows a ray of light from a small lamp striking a plane mirror. Which of the following correctly describes the position and characteristic of the image? A at P and is real B at P and is virtual C at R and is real D at R and is virtual 340 m 680 m P Q cliff

10 22 The figure shows the electromagnetic spec