2025 Edgefield Phys P1 QP

Class: Candidate Name: Candidate Index Number: EDGEFIELD SECONDARY SCHOOL 2025 PRELIMINARY EXAMINATION Secondary 4 O Syllabus PHYSICS Paper 1 Multiple Choice Additional Materials: OTAS 6091/ 01 August 2025 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. 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. 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. FOR EXAMINER’S USE My target grade/mark: _________ TOTAL / 40 Parent’s signature This document consists of 18 printed pages.

2 EDG/PRELIM-2025/SEC 4 PHYSICS (6091)/ Paper 1/TSS Answer all questions 1 The approximate diameter of the earth is 1.3 x 107 m and the diameter of a nitrogen atom is 1.5 x 10-10 m. How are these values expressed with prefixes? diameter of the Earth diameter of nitrogen atom A 1.3 x 10-2 Mm 1.5 x 10-1 μm B 1.3 x 10-2 Gm 1.5 x 10-1 μm C 1.3 x 10-2 Mm 1.5 x 10-1 nm D 1.3 x 10-2 Gm 1.5 x 10-1 nm 2 The diagram shows the resultant R of a 3.0 N force and a 4.0 N force acting at a point. The angle between the 3.0 N force and the 4.0 N force can be any value from 0° to 90°. Which value of R is not possible? A 4.0 N B 5.0 N C 6.0 N D 7.0 N 3 A parachutist jumps from a plane and opens his parachute some time later. Which of the following is true about the directions of the velocity and acceleration of the parachutist after opening his parachute and before reaching terminal velocity? velocity acceleration A downwards downwards B downwards upwards C upwards downwards D upwards upwards R

EDG/PRELIM-2025/SEC 4 PHYSICS (6091)/ Paper 1/TSS [Turn over 3 4 A sphere moves along a smooth rail from P to Q as shown. Which of the following graphs best represents the variation of the distance d travelled by the sphere with time t? A B C D 5 A metal cube has a mass of 15 g. Each side measures 4.0 cm. The density of the metal is 3.0 g/cm3. There is empty space in the middle of the cube. What is the volume of the empty space? A 5.0 cm3 B 11 cm3 C 19 cm3 D 59 cm3 6 An experiment is carried out by an astronaut on the surface of the Moon. A coin and a feather are dropped at the same instant from the same height. Which of the following statements is correct? A The coin falls faster than the feather, but both take a longer time than if they were falling from the same height on Earth. B The coin falls faster than the feather, but both take a shorter time than if they were falling from the same height on Earth. C They fall together, taking a longer time than the coin would in falling from the same height on Earth. D They fall together, taking a shorter time than the coin would in falling from the same height on Earth. P Q d d d d t t t t

4 EDG/PRELIM-2025/SEC 4 PHYSICS (6091)/ Paper 1/TSS 7 Two blocks with mass 5m and 3m are pushed along a smooth horizontal surface by an applied force F. What is the magnitude of the force exerted between the blocks? A F B 2 8 F C 3 8 F D 8 3 F 8 A girl uses paper clips to balance a toy bird on her finger, as shown. What is the effect of the paper clips? A They do not affect the centre of gravity but increase the weight. B They help to lower the centre of gravity below her finger. C They help to raise the centre of gravity above her finger. D They help to raise the centre of gravity to her finger. 9 The diagram shows a uniform metal bar of mass 30 kg. A student pulls straight up with a force F at one end Y of the bar so that it pivots about the end X. When the end Y just comes off the ground, what is the value of the force F? A 15 N B 60 N C 150 N D 240 N F X Y toy bird paper clips F 5m 3m

EDG/PRELIM-2025/SEC 4 PHYSICS (6091)/ Paper 1/TSS [Turn over 5 10 A fixed mass of gas is heated in a cylinder with a movable piston. The piston is pushed outwards by the gas to maintain a constant pressure in the piston. Which row about the gas particles is correct? frequency of collision with the inner wall of cylinder average speed A decrease increase B decrease no change C increase increase D increase no change 11 The pressure inside a gas cylinder is measured separately using two different mercury manometers as shown in Fig. P and Q. One of the manometers has an open end while the other has a sealed end. A barometer, as shown in Fig. R, is used to measure the atmospheric pressure at the location of the experiment. The diagrams are not drawn to scale. What is the height, h, of the mercury in Fig. Q? A 40 mm B 720 mm C 800 mm D 1000 mm vacuum 760 mm mercury sealed end Pga to gas supply h Pga Patm 200 mm to gas supply 240 mm manometer barometer Fig. P Fig. Q Fig. R manometer vacuum

6 EDG/PRELIM-2025/SEC 4 PHYSICS (6091)/ Paper 1/TSS 12 Four balls with different masses are dropped from the heights shown. Air resistance may be ignored. Which ball has the smallest average speed? 13 A weight W hangs from a trolley that runs along a rail. The trolley moves horizontally through a distance p and simultaneously raises the weight through a height q. As a result, the weight moves through a distance r from X to Y. It starts and finishes at rest. How much work is done on the weight during this process? A Wp B W(p + q) C Wq D Wr A B C D

EDG/PRELIM-2025/SEC 4 PHYSICS (6091)/ Paper 1/TSS [Turn over 7 14 Smoke particles in a transparent container are observed under a microscope. A small point of light is seen to move around as shown. When the temperature in the container is raised, what change can be observed? A The small point of light becomes brighter. B The small point of light changes direction more frequently. C The small point of light increases in size. D The small point of light moves slower. 15 A substance consists of particles that are close together and moving past each other at random. The average speed of the particles is gradually increasing. What best describes the substance? A a gas being heated B a liquid being heated C a liquid undergoing solidification D a solid being heated 16 The diagram shows the cross-sectional area of a shallow puddle of water on a road after rain. The surrounding temperature and the wind speed remain constant. Which of the following best explains how the rate of evaporation of the water from the puddle changes? rate of evaporation explanation A decreases depth of puddle decreases B decreases surface area decreases C increases volume of water decreases D remains constant temperature and wind speed do not change puddle shallow hole road surface

8 EDG/PRELIM-2025/SEC 4 PHYSICS (6091)/ Paper 1/TSS 17 Eskimos build igloos as temporary shelter in extremely cold places such as the Arctic. The diagram shows a cross-section of an igloo. The entrance is dug deep enough (lower than the sleeping area) to create a cold sink. Which of the following statements about the air in the igloo i