ACS Exp Prelim 2024 P1 final

This document consists of 15 printed pages PRELIMINARY EXAMINATION 2024 YEAR 4 EXPRESS PHYSICS 6091 / 01 Thursday 15 August 2024 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and index number on the Answer Sheet in the spaces. 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 2B pencil on the separate OTAS. 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. Unless otherwise stated, take gravitational field strength, g, to be 10 N kg -1. Index Number Name

Y4Exp Physics Prelim 2024 P1 Page 2 of 15 1 The following physical quantities can be either positive or negative. s : displacement of a particle along a straight line θ : temperature on the Celsius scale q : electric charge V : potential difference on a digital voltmeter Which of these quantities are scalars? A s, θ, q, V B θ, q, V C θ, V D θ only 2 Which is a pair of SI base units? A Ampere, Voltage B Degree Celsius, Second C Kelvin, Kilogram D Metre, Newton 3 Four cars, A, B, C and D, move from rest in a straight line. The cars take the same time to accelerate to a velocity of 60 km h–1. Their velocity–time graphs are shown. Which car reaches a velocity of 60 km h–1 in the longest distance? velocity/ km h-1 time / h

Y4Exp Physics Prelim 2024 P1 Page 3 of 15 4 Two cars X and Y are positioned as shown at time t = 0 s. They are travelling in the same direction. Car X is 50 m behind car Y and has a constant velocity of 30 m s –1 as shown below. Car Y has a constant velocity of 20 m s–1. What is the value of time t when car X is level with car Y? A 1.7 s B 2.5 s C 5.0 s D 10.0 s 5 What is meant by the weight of an object? A The gravitational field acting on the object. B The gravitational force acting on the object. C The mass of the object multiplied by the gravitational force acting on the object. D The object’s mass multiplied by its acceleration. 6 The gravitational field strength in space is smaller than on the Earth’s surface. A rocket is used to launch a satellite from the Earth’s surface into space. How are the mass and the weight of the satellite affected as the satellite moves away from the surface of the Earth and into space? A Both the mass and the weight of the satellite are unaffected. B Both the mass and the weight of the satellite decreases. C The mass of the satellite is unaffected and the weight of the satellite increases. D The mass of the satellite is unaffected and the weight of the satellite decreases. 7 A cyclist is riding at a steady speed on a level road. According to Newton’s third law of motion, what is equal and opposite to the backward push of the back wheel on the road? A Force exerted by the cyclist on the pedals. B Forward push of the road on the back wheel. C Tension in the cycle chain of the bicycle. D Total air resistance and frictional force acting on the cyclist.

Y4Exp Physics Prelim 2024 P1 Page 4 of 15 8 The diagram shows arrows representing two vector quantities. Which diagram shows the resultant R of these two vectors? A B C D 9 Four table lamps are shown below with the position M of the centre of mass in each case. Which lamp is the least stable?

Y4Exp Physics Prelim 2024 P1 Page 5 of 15 10 In a coal-fired power station, the coal is burnt and internal store (heat) is produced. The internal store is used to produce electrical store. In which order does the energy pass through parts of the power station? A boiler → generator → turbine B boiler → turbine → generator C turbine → boiler → generator D turbine → generator → boiler 11 A 300 N force is applied to a box to move it up a ramp, as shown in the diagram below. How much work is done by the force when moving the box from point X to point Y? A 300 J B 600 J C 900 J D 1500 J 12 A small hydroelectric power station diverts water from a river. Every second, 30 kg of water flows through a pipe and falls through a vertical drop of 18 m. The efficiency of the power station is 75%. The gravitational field strength g is 10 N / kg. What is the power output? A 1350 W B 4050 W C 5400 W D 405 kW

Y4Exp Physics Prelim 2024 P1 Page 6 of 15 13 Four beakers contain the same liquid. At which point is the pressure the greatest? 14 The pressure of a gas in a cylinder is measured using a water manometer. The density of water is 1000 kg/m3 and the gravitational field strength g is 10 N/kg. How much higher is the gas pressure than the atmospheric pressure? A 2000 Pa B 101 000 Pa C 200 000 Pa D 301 000 Pa 15 In an experiment to demonstrate Brownian motion, smoke particles in a container are illuminated by a strong light source and observed through a microscope. The particles are seen as small specks of light that are in motion. What causes the Brownian motion? A Collisions between the air molecules and smoke particles. B Collisions between the smoke particles and the walls of the container. C Convection currents within the air molecules as they are warmed by the light source. D Kinetic energy gained by the smoke particles due to the absorption of light.

Y4Exp Physics Prelim 2024 P1 Page 7 of 15 16 Which statement about thermal radiation is correct? A Thermal radiation emits better on white surfaces than black surfaces. B Thermal radiation is a longitudinal wave. C Thermal radiation travels only as an ultra-violet wave. D Thermal radiation travels at the speed of light in a vacuum. 17 Which of the following correctly describes the molecules in a beaker of water at 55 °C? A All the molecules travel at the same speed. This speed is not large enough for any of the molecules to leave the surface of the water. There are attractive forces between the molecules. B The molecules have a range of speeds. Some molecules travel sufficiently fast to leave the surface of the water. There are no forces between the molecules. C The molecules have a range of speeds. Some molecules travel sufficiently fast to leave the surface of the water. There are attractive forces between the molecules. D The molecules have a range of speeds. The fastest molecules are unable to leave the surface of the water. There are attractive forces between the molecules. 18 Some ice cubes are taken from a freezer and heated in a container. The readings of temperature and time are recorded on the graph. Which temperature is 0 °C? 19 In an experiment to find the heat capacity and specific heat capacity of a metal, it is found that 5200 J is needed to raise the temperature of a 2.0 kg block by 20 °C. Find the values for the heat capacity and specific heat capacity of the metal given by these results? Heat Capacity / (J/°C) Specific Heat Capacity / J/(kg K) A 260 130 B 2600 52 000 C 52 000 2600 D 208 000 104 000 temperature / K time / min

Y4Exp Physics Prelim 2024 P1 Page 8 of 15 20 A displacement-time graph is shown for a particular wave. A second wave of similar type has twice the amplitude and half the frequency. When drawn on the same axes, what would the second wave look like? A B C D 21 The diagram below represents a wave on a stretched string. The frequency of the wave is 2.0 Hz and the length x is 10 m. Which row correctly represents the length x, type