BBSS 4E O Prelim 2024 Physics 6091 P1 QP

Bukit Batok Secondary School GCE O LEVEL PRELIMINARY EXAMINATIONS 2024 SECONDARY 4 EXPRESS PHYSICS 6091/01 Paper 1 Multiple Choice 28 August 2024 1 Hour 1005 – 1105 h Additional Materials: Multiple Choice Answer Sheet (OAS) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, index number and class 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 OAS. 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 Question paper consists of 18 printed pages including this cover page. Name: …………………………………………. Index no. : ………. Class…… …...

BBSS/ Prelims 2024/ sec 4E/ Physics (6091)/ P1 Applying past knowledge to new situations 2 1 Which pair contains one vector quantity and one scalar quantity? A acceleration and friction B displacement and charge C moment and force D velocity and weight 2 A cyclist, riding at a speed of 5.0 m/s, brakes with uniform deceleration and stops in a distance of 300 cm. How long does the cyclist take to stop? A 0.60 s B 1.2 s C 1.3 s D 3.0 s 3 A lorry travels along a straight road. It decelerates upon seeing the red light ahead. Which diagram shows the displacement-time graph of the lorry?

BBSS/ Prelims 2024/ sec 4E/ Physics (6091)/ P1 Applying past knowledge to new situations 3 4 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 5 A helicopter moves through the air and ascends against a total resistive force of 2000 N. The propeller on the helicopter sweeps the air downwards with a force of 4200 N. What is the upward force on the propeller due to the air? A 2200 N B 2000 N C 4200 N D 6200 N 6 An alloy is made by mixing 450 g of cobalt of density 9.0 g/cm3 with 240 g of steel of density 8.0 g/cm3. Assuming no chemical reaction occurs, what is the density of the alloy? A 6.0 g/cm3 B 8.6 g/cm3 C 17 g/cm3 D 41 g/cm3

BBSS/ Prelims 2024/ sec 4E/ Physics (6091)/ P1 Applying past knowledge to new situations 4 7 A square shop sign of side 1.0 m made from a uniform flat lamina PQRS is attached to a vertical wall by a hinge at P so that S rests against the wall vertically below P. The mass of the sign is 5.0 kg. What is the normal reaction exerted by the wall at S? A 25 N B 50 N C 75N D 100 N 8 The diagram shows a bottle containing air, oil and sand. More sand is added to the bottle. This affects the position of the centre of gravity of the bottle and its contents. How might the centre of gravity move? A from X towards Y B from Z towards Y C from Y towards X D from Y towards Z

BBSS/ Prelims 2024/ sec 4E/ Physics (6091)/ P1 Applying past knowledge to new situations 5 9 The diagram shows a motor used to pull a mass of 2.0 kg up a ramp. The mass is moving at constant speed between X and Y. The gravitational field strength of Earth is 10 N/kg What is the power of the motor if the mass is lifted from point X to point Y in 4.0 s? A 7.0 W B 18 W C 25 W D 43 W 10 A fixed mass of gas is cooled while kept at constant volume. How do the behaviour and distance of the molecules of the gas change? average speed average distance apart A decreases unchanged B decreases decreases C unchanged unchanged D unchanged decreases 11 A slice of bread is placed under a red-hot electric grill to make toast. How is thermal energy transferred from the grill to the bread? A radiation only B conduction and radiation C convection and radiation D conduction, convection and radiation motor 2.0 kg 2.0 kg 5.0 m 9.0 m X Y

BBSS/ Prelims 2024/ sec 4E/ Physics (6091)/ P1 Applying past knowledge to new situations 6 12 The 200 V battery of an electric car is charged with a current of 33 A for 4.0 hours. The efficiency of the charging process is 0.90. How much useful energy is transferred to the battery? A 21 000 000 J B 86 000 000 J C 95 000 000 J D 110 000 000 J 13 The system shown in the diagram contains a liquid. The three pistons are connected by means of the reservoir of liquid. A downward force of 250 N is exerted on piston Y. What is the upward force exerted by the liquid on piston X? A 31.3 N B 62.5 N C 1000 N D 2000 N

BBSS/ Prelims 2024/ sec 4E/ Physics (6091)/ P1 Applying past knowledge to new situations 7 14 A simple mercury barometer is used to measure atmospheric pressure as shown below. What is the pressure at X? A 0 cmHg B 15 cmHg C 65 cmHg D 80 cmHg 15 Air in a closed container contains smoke, illuminated by bright light. When viewed through a microscope, bright specks of light are seen moving at random. Which statement is correct? A The random motion of specks is faster in a vacuum. B The specks move faster when the air is at a higher temperature. C The specks seen are molecules of air in rapid random motion. D When the light is turned off, the specks slow down and stop moving. 16 How does the motion of molecules in a solid differ from that of molecules in a gas? molecules in a solid molecules in a gas A rotate and vibrate randomly move randomly B rotate and vibrate randomly vibrate randomly C vibrate about their fixed positions move randomly D vibrate about their fixed positions vibrate randomly

BBSS/ Prelims 2024/ sec 4E/ Physics (6091)/ P1 Applying past knowledge to new situations 8 17 The diagram shows a glass tube filled with water and suspended above a bench. The water is free to circulate around the tube. At point P, there is a convection current moving in a downwards direction. At which points are the tube heated or cooled to cause this convection current? A Heating at A and heating at D B Cooling at B and heating at D C Heating at C and cooling at B D Heating at A and cooling at C 18 A box with mass 4.0 kg is pulled from rest along a horizontal floor by a constant force F. A constant frictional force of 1.0 N acts on the box. When the box has travelled 1.0 m its velocity is 1.5 m/s. The kinetic store of the box is equal to the work done on the box. What is force F? A 2.0 N B 3.5 N C 4.0 N D 5.5 N

BBSS/ Prelims 2024/ sec 4E/ Physics (6091)/ P1 Applying past knowledge to new situations 9 19 The diagram below shows the cross-section of a plastic container. A student claims that the container can keep food warm for a long duration. He offers the following explanations: I The plastic cover reduces heat loss through conduction as plastic is a poor conductor of heat. II The black inner walls will absorb heat from the environment to keep food warm since black surfaces are good absorbers of infrared radiation. III The vacuum between the walls of the container will prevent