Edgefield 6091-4E-PRELIM-P1-2024

Class: Candidate Name: Candidate Index Number: EDGEFIELD SECONDARY SCHOOL 2024 PRELIMINARY EXAMINATION Secondary 4 O Syllabus PHYSICS Paper 1 Multiple Choice Additional Materials: OTAS 6091/ 01 August 2024 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 19 printed pages.

2 EDG/PRELIM-2024/SEC 4 PHYSICS (6091)/ Paper 1/YAC Answer all questions 1 A car accelerates at 5.0 m / s2 along a straight, horizontal road and reaches a velocity of 20 m / s in a time of 4.0 s. During this time, its total displacement is 40 m. Which quantity is a scalar? A a time of 4.0 s B a velocity of 20 m / s C an acceleration of 5.0 m / s2 D displacement of 40 m 2 The diagram shows the distance-time graph of a car. The car is travelling along a straight road up a hill. Which quantity for the car is constant and greater than zero? A acceleration B gravitational potential energy C kinetic energy D resultant force 3 On the Earth’s surface, the gravitational field strength is 10 N / kg. On the surface of Mars, the gravitational field strength is 3.8 N / kg. A robot vehicle has a weight of 2000 N on Earth. What is the weight of the robot vehicle on Mars? A 200 N B 760 N C 7600 N D 76 000 N

EDG/PRELIM-2024/SEC 4 PHYSICS (6091)/ Paper 1/YAC [Turn over 3 4 In a laboratory experiment, a feather falls from rest in an evacuated vertical tube of length L. The feather took a time of t to fall from the top to the bottom of the tube. The diagram shows the experiment setup and the velocity-time graph of the feather as it falls. How far will the feather have fallen from the top of the tube in 0.5t ? A 0.13 L B 0.25 L C 0.50 L D 0.75 L 5 A uniform plank is pivoted at its mid-point. Two weights are added to the plank, one weight on each side of the pivot in the positions shown. A vertical force is applied at point X to balance the plank. What is the size and direction of this force? size/ N direction A 2.0 downwards B 2.0 upwards C 4.0 downwards D 4.0 upwards

4 EDG/PRELIM-2024/SEC 4 PHYSICS (6091)/ Paper 1/YAC 6 The diagram shows a non-uniform rod laid on two supports A and B across two weighing balances. Its centre of gravity is not at its geometrical centre. The rod has a length of 2 m. Where is the rod’s centre of gravity? A 0.27 m to the left of support B B 1.3 m to the left of support B C 1.5 m to the right of support A D 1.7 m to the right of support A 7 A brick of weight 80 N stands upright on the ground as shown. What is the least and most pressure it exerts on the ground? least pressure/ Pa most pressure/ Pa A 4000 8000 B 4000 16000 C 8000 8000 D 8000 16000 Support A Support B rod

EDG/PRELIM-2024/SEC 4 PHYSICS (6091)/ Paper 1/YAC [Turn over 5 8 The diagram shows a simple mercury barometer alongside a mercury manometer. The manometer contains some trapped gas. What is the pressure of the trapped gas? A 10 cm of mercury B 50 cm of mercury C 66 cm of mercury D 86 cm of mercury 9 A gas is in a sealed container of constant volume. The gas is heated and the pressure of the gas on the walls of the container increases. How do the particles of the gas cause this increase in pressure? A They expand. B They hit each other more frequently. C They hit the container walls more frequently. D They vibrate faster.

6 EDG/PRELIM-2024/SEC 4 PHYSICS (6091)/ Paper 1/YAC 10 Very small pollen grains are suspended in a beaker of water. A bright light shines from the side. Small, bright dots of light are seen through a microscope. The dots move in rapidly changing, random directions. What are the bright dots? A pollen grains being hit by other pollen grains B pollen grains being hit by water molecules C water molecules being hit by other water molecules D water molecules being hit by pollen grains 11 The diagram shows a block being pulled up a ramp by a rope. The block has weight W and the rope is pulled with force F. The block moves distance PR and is raised through height QR. What is the equation for the work done on the block by the rope? A force F × distance PR B force F × height QR C weight W × distance PQ D weight W × distance PR

EDG/PRELIM-2024/SEC 4 PHYSICS (6091)/ Paper 1/YAC [Turn over 7 12 Which row about the change of energy in the energy store is correct? process energy store change of energy in store A air passes through a wind turbine gravitational potential energy of air increases B air passes through a wind turbine kinetic energy of air increases C water pumped up to a high-altitude dam gravitational potential energy of water increases D water pumped up to a high-altitude dam kinetic energy of water decreases 13 A slice of bread is placed under a red-hot electric grill to make toast. How does heat energy reach the bread? A conduction and convection B conduction only C convection and radiation D radiation only 14 The following statements describe heat loss from objects: I. heater with polished metal grills at 60 °C placed on the floor of room; II. heating element of a kettle at 100 °C, in water; III. metal pan with black surfaces at 200 °C, in contact with a concrete floor; IV. filament of lamp at 1000 °C in an evacuated glass bulb. Which object(s) loses most of its heat by radiation? A IV only B I and III C II and IV D I, II and IV

8 EDG/PRELIM-2024/SEC 4 PHYSICS (6091)/ Paper 1/YAC 15 The diagram shows the inside of a refrigerator. When the refrigerator is first switched on, what happens to the air near the cooling unit? the particles of this air the density of this air A become smaller decreases B become smaller increases C move closer together decreases D move closer together increases 16 The same heater was used to heat three different liquids X, Y and Z. The mass of the liquids and the temperature increase after five minutes was recorded. liquid mass of liquid / g increase in temperature after 5.0 minutes / °C X 200 15 Y 100 12 Z 150 10 Which of the following correctly compares specific heat capacities cX, cY and cZ of liquids X, Y and Z respectively? A cX > cY > cZ B cY > cZ > cX C cZ > cX > cY D cZ > cY > cX

EDG/PRELIM-2024/SEC 4 PHYSICS (6091)/ Paper 1/YAC [Turn over 9 17 Using an electric kettle, 200 g of water at 100 °C is converted into steam at 100 °C in 300 seconds. The specific latent heat of steam is 2250 J / g. What is the average electrical power used? A 2250 300 × 200 W B 200 × 2250 300 W C 300 × 2250 200 W D 200 × 300 × 2250 W 18 A substance can exist in three different states: solid, liquid or gas. Each of the two statements below describes a change of state. change 1: Particles move much closer together but continue to travel throughout the substance. change 2: Particles stop travelling throughout the substance and just vibrate about fixed positions. Which changes of state do these statements describe? change 1 change 2 A c