2024 CCHM Physics 6091 P1 (QP)

[Turn over Name: Class: Class Register Number: PRELIMINARY EXAMINATION 2024 SECONDARY 4 PHYSICS 6091/01 Paper 1 Multiple Choice 10 September 2024 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, class and register number clearly in the spaces provided at the top of this page. There are forty questions on 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 1 blank page.

2 2024 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/01 1 In order to determine the period of a pendulum, a student times one complete swing of the pendulum using an analogue stop-watch with a second hand. Which change of method produces the greatest improvement in accuracy? A asking a friend with a shorter reaction time to take the measurement B measuring the time for 25 swings of the pendulum and dividing it by 25 C measuring the time for a half swing of the pendulum and doubling it D using a digital timer 2 A student uses a metre ruler to measure the length of six identical table-tennis balls placed between two wooden blocks. What is the diameter of one ball? A 4.0 cm B 5.0 cm C 6.0 cm D 8.0 cm 3 The diagram shows a series of images of a moving object taken at regular intervals. The object is moving from left to right. Which statement describes the motion of the object? A The object accelerates continuously. B The object decelerates continuously. C The object travels at constant speed and then accelerates. D The object travels at constant speed and then decelerates.

3 [Turn over 2024 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/01 4 A train is on a straight track. The graph shows how a quantity y varies with time. Which statements can be true? 1 The train is stationary and y represents the distance from the last station. 2 The train is moving and y represents the distance from the last station. 3 The train is stationary and y represents the speed of the train. 4 The train is moving and y represents the speed of the train. A 1 and 2 B 2 and 3 C 3 and 4 D 4 and 1 5 A wooden block is pushed across a table at constant speed. Which statement about the frictional force is correct? A The frictional force increases as the block moves at constant speed. B The frictional force is equal to the pushing force. C The frictional force is greater than the pushing force. D The frictional force is less than the pushing force.

4 2024 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/01 6 A small submarine of mass 1000 kg sinks in water with a constant speed of 2.0 m / s. What is the resultant force exerted on the submarine as it sinks? A 0 N B 500 N downwards C 2000 N downwards D 10000 N downwards 7 A plastic ball has a mass of 4.0 g and a volume of 20 cm3. There is a crack in the ball’s surface. The ball is placed in a bath of water. Water leaks into the ball without changing the volume of the ball and eventually the ball sinks. The density of water = 1.0 g / cm3. Which mass of water has entered the ball when the top of the ball is first level with the water surface? A 5.0 g B 16 g C 20 g D 24 g 8 A uniform metre rule of weight W is pivoted at the 25 cm mark and held horizontal by a force F applied upwards at the 100 cm mark. The rule is supported by a vertical force P acting at the pivot. What is the magnitude of P? A 1/3 W B 1/2 W C 2/3 W D 4/3 W

5 [Turn over 2024 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/01 9 The centre of gravity of a solid rectangular block is at its centre. A small heavy weight is available. In which arrangement is the centre of gravity the lowest? A with face X on a table B with face Y on a table C with face X on a table and the heavy weight attached centrally on top of the block D with face Y on a table and the heavy weight attached centrally on top of the block 10 When a diver swims down from the surface of the water to a depth of 10 m, the pressure experienced increases from 100 000 N / m2 to 200 000 N / m2. Which statement explains this increase in pressure? A The density of the water increases with depth. B The gravitational field strength increases with depth C The weight of water above the diver increases with depth. D Water is increasingly compressed with depth. 11 Tractors have large tyres. These help to prevent the wheels from sinking into soft ground. Which statement explains this? A Larger tyres exert a greater force on the ground. B Larger tyres exert a greater pressure on the ground. C Larger tyres exert a smaller force on the ground. D Larger tyres exert a smaller pressure on the ground.

6 2024 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/01 12 A box is initially at rest at the top of a rough slope. The box slides down the slope. The weight of the box is 20 N. The slope is 4.0 m long and 2.0 m high. The box does 10 J of work against friction as it slides down the slope. What is the speed of the box as it reaches the bottom of the slope? A 5.4 m / s B 6.3 m / s C 7.1 m / s D 9.5 m / s 13 In a small power station, biofuel is used to generate electricity. Which energy store is reduced by this process? A chemical B kinetic C internal D nuclear 14 Brownian motion is the random motion of particles. In which states of matter is Brownian motion observed? A solids, liquids and gases B solids and liquids only C solids and gases only D liquids and gases only

7 [Turn over 2024 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/01 15 A gas is contained in a cylinder by a movable piston. The gas is heated so that it expands at constant pressure. How is the force of each collision of a gas particle with the piston affected and how does the frequency of collisions between the gas particles and the piston change? force frequency A increase decrease B increase increase C stays the same decrease D stays the same increase 16 The diagram shows the view of a room heated by a radiator. The arrowed line from X to Y is the path of the convection current in the air. Which row shows the correct air density at X and air temperature at Y? air density at X air temperature at Y A higher higher B higher lower C lower higher D lower lower

8 2024 Preliminary Exam/CCHMS/Secondary 4/Physics/6091/01 17 A cook heats some water in a pan on a hotplate. The temperature of the water rises by 10 C in time t. He then puts the same volume of oil in an identical pan on the same hotplate. The specific heat capacity of water is 2.5 times that of oil and water is 1.1 times denser than oil. What is the time for the temperature of the oil to rise by 10 C? A 0.36 t B 0.44 t C 2.3 t D 2.8 t 18 A student on a camping expedition cools a sealed bottle of water which is at the same temperature as the surrounding air. Which method cools the water at the greatest rate? A Wrap the bottle in aluminium foil and place it in a shady place. B Wrap the bottle in dry, white cloth and put it in a shady place. C Wrap the bottle in foam and put it in a breeze. D Wrap the bottle in wet paper and put it in a br