QSS 2024 4E Physics Prelim P1

NAME: CLASS: INDEX NO: QUEENSWAY SECONDARY SCHOOL PRELIMINARY EXAMINATION 2024 SECONDARY 4 EXPRESS PHYSICS 6091/01 Paper 1 Multiple Choice 28 August 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 index number on the Answer Sheet in the spaces provided. 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 20 printed pages. [Turn over Parent’s Signature:

2 1 A voltage of 0.4 decivolt is applied across a resistor, resulting in a current of 20 nanoamperes. Which of the following gives the voltage in volt and the current in ampere? voltage / V current / A A 0.004 0.00002 B 0.004 0.00000002 C 0.04 0.00002 D 0.04 0.00000002 2 The graph shows the speed of a weather balloon as it rises through the atmosphere. At which point in the balloon’s rise does the acceleration start to decrease? 3 The graph shows the speed of a car as it moves from rest. What is the average speed of the car during the first 3 s? A 4 m/s B 6 m/s C 18 m/s D 36 m/s speed time A B C D time / s speed m / s

3 4 Planks of wood delivered to a building site are all 15.0 cm wide and 2.00 cm thick but they have different lengths. They are made of wood with a density of 1600 kg/m3. The planks are lifted by a pulley system that cannot lift masses greater than 6.0 kg. What is the length of the longest plank that can be lifted by this pulley system? A 125 cm B 320 cm C 500 cm D 1280 cm 5 The weight of a spacecraft is 2500 N on Earth and 950 N on Mercury. The gravitational field strength on Earth is 10 N/kg. What is the gravitational field strength on Mercury? A 3.80 N/kg B 2.63 N/kg C 0.38 N/kg D 0.26 N/kg 6 Two forces act on a car as shown. If force F is equal to force R, which of the following is correct? A The car is moving with non-uniform acceleration. B The car is moving with uniform acceleration. C The car is moving with uniform velocity. D The car is not moving. forward force F air resistance R 2.00 cm 15.0 cm length

4 7 The total mass of the load and the wheelbarrow shown i s 75 kg. The gravitational field strength is 10 N/kg. What is the value of force F needed to just lift the loaded wheelbarrow? A 440 N B 540 N C 750 N D 1050 N 8 The diagram shows a tube filled with mercury. The length of k is 320 mm. Atmospheric pressure is 760 mm Hg. The gravitational field strength is 10 N/kg and the density of mercury is 13600 kg/m3. What is the pressure in the air column on the right-hand side of the tube? A 10 300 Pa B 43 500 Pa C 59 800 Pa D 103 000 Pa vacuum mercury air k F weight of load and wheelbarrow load pivot 70 cm 50 cm

5 9 Five blocks have the same mass but different base areas. They all rest on a horizontal table. A graph is plotted to show the relationship between the pressure exerted on the table by the block and the base area of the block. Which graph shows this relationship? A B C D pressure area 0 0 pressure area 0 0 pressure area 0 0 pressure area 0 0

6 10 A child has a set of wooden 3-dimensional capital letters. Which letter, H, I, R or Y, is the most stable when standing upright on a table? 11 Work is done when a force of 400 N pulls a crate of weight 500 N at a constant speed along a ramp, as shown. Part of the work done increases the gravitational potential energy E of the crate and the rest is work done W against friction. What are the values of E and W? E / J W / J A 1500 500 B 1500 2000 C 2000 2500 D 3500 500 A B C D 5.0 m 3.0 m 500N 400N

7 12 An apartment block receives water from a nearby reservoir. A pump is necessary to lift the water into a storage tank at the top of the building. The gravitational field strength is 10 N/kg. Given that the pump has an efficiency of 70%, how much input power does the pump require to lift each kilogram of water into the tank in 0.6 s? A 170 W B 240 W C 830 W D 1200 W 13 The diagram shows a setup used to observe the behaviour of smoke in air. When viewed through the microscope, bright specks of light are seen moving at random. Which statement is correct? A The random motion is due to collisions between the smoke molecules. B The specks move faster when the air is at a higher temperature. C The energy of the light causes the random motion. D The specks are the air molecules in random motion. reservoir tank 10m 50m pump light smoke cell smoke and air microscope thin glass cover

8 14 A sample of gas in a sealed container of fixed volume is heated. Which of the following quantities will increase? 1 Average distance between the gas molecules. 2 Average kinetic energy of the gas molecules. 3 Average number of collisions per second made by the gas molecules with the container walls. A 1 only B 2 only C 2 and 3 only D 1, 2 and 3 15 The walls of a refrigerator are insulated using both expanded polystyrene and aluminium foil. How is the transfer of thermal energy reduced? A The aluminium foil is a good emitter of radiation. B The expanded polystyrene is a good emitter of radiation. C The expanded polystyrene and aluminium foil provide a bigger exposed surface area. D The air pockets in the expanded polystyrene are poor conductors of heat. inner wall expanded polystyrene with air pockets outer wall aluminium foil

9 16 The diagram shows a computer chip fitted with a heat sink with black metal fins. Which of the following explain how thermal energy is transferred easily from the computer chip to the surroundings? 1 The metal fins conduct heat from the computer chip to the surroundings. 2 The rate of heat transfer to the air by convection increases as a result of the metal fins. 3 The black metal fins are good reflectors of radiation. A 1 and 2 B 1 and 3 C 2 and 3 D 1, 2 and 3 17 Two solid substances, P and Q, are heated by identical heaters. The graph s below show how their temperatures vary with time. If P and Q have the same mass, which of the following statement(s) is/are correct? 1 Solid P has a higher specific heat capacity than solid Q. 2 The specific latent heat of fusion of P is lower than that of Q. 3 Liquid P has a lower specific heat capacity than liquid Q. A 1 only B 2 only C 3 only D 2 and 3 only heat sink computer chip black metal fins time / min temperature / °C Q P

10 18 The d iagram below shows a simple water distiller. Water is kept boiling in region 1, completely condensed in region 2 and collected in region 3. In which region is latent heat of vaporisation absorbed or released by the water? absorbed released A 1 2 B 1 3 C 2 1 D 3 1 19 A transverse wave is represented by the graph below.