NHHS 2025 PHY PRELIM P1 QP

[Turn over] Name: _____________________________________ ( ) Class : Sec 4 / ( ) Subject : Physics Paper : 6091/1 Level : Secondary Four Date : 3 September 2025 Duration : 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the separate Answer Sheet in the spaces provided. There are forty questions in 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. INFORMATION FOR CANDIDATES 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 17 printed pages. NAN HUA HIGH SCHOOL PRELIMINARY EXAMINATION 2025

Nan Hua High School Preliminary Examination 2025 Physics 6091/1 Page 2 of 17 1 What is the estimate of the radius of planet earth? A 6.4 km B 6.4 Mm C 6.4 Gm D 6.4 Tm 2 The graph shows how the displacement of a girl changes as she walks on a pavement. What is the total distance travelled by the girl? A 0 m B 50 m C 100 m D 3 500 m 3 At t = 0 s, a stone is thrown vertically up into the air at 20 m/s. Which of the following best describes the motion of the stone in the air at t = 2.0 s? speed / m/s acceleration / m/s2 A 10 0 B 10 10 C 0 0 D 0 10

Nan Hua High School Preliminary Examination 2025 Physics 6091/1 Page 3 of 17 4 An aeroplane is half way along a runway before it takes off. The arrows show the directions of four forces acting on the aeroplane. The drag forces on the aeroplane are negligible. The gravitational field strength, g, is 10 N / kg. The acceleration of the aeroplane is 2 m / s2. What is the largest force? A the force on the wheels from the ground B the lift acting on the wings C the thrust from the jet engines D the weight of the aeroplane 5 A man pushes a heavy box along the ground. A force acts between the man’s hands and the box. Another force acts between the man’s feet and the floor. In which directions do these forces act on the man? force on man’s hands force on man’s feet A towards the left towards the left B towards the left towards the right C towards the right towards the left D towards the right towards the right

Nan Hua High School Preliminary Examination 2025 Physics 6091/1 Page 4 of 17 6 A fully loaded barrel of weight W is being rolled up a slope before coming to a stop. The image below shows the force P required to hold the barrel at rest on the slope, the frictional force f between the barrel and the slope, and the normal contact force N on the barrel by the slope. Which diagram represents the forces exerted by the slope on the barrel and their resultant force?

Nan Hua High School Preliminary Examination 2025 Physics 6091/1 Page 5 of 17 7 A lever is used to lift a heavy object. A force of 25 N is applied at a distance of 90 cm from the pivot P. The load F exerted by the heavy object on the lever is 5.0 cm from pivot P. The directions of the 25 N force and of the load F are both at right-angles to the lever. Assume the mass of the lever is negligible. What is the resultant moment about pivot P if load F is 500 N? A 0 Nm B 2.5 Nm anticlockwise C 22.5 Nm clockwise D 250 Nm anticlockwise 8 A toy monkey is placed at the edge of a table at point P as shown. The toy can be balanced on the table by adding a lump of plasticine at the end of the tail. In which position is the toy’s centre of gravity? A directly above P B directly below P C directly above the plasticine D directly below the plasticine

Nan Hua High School Preliminary Examination 2025 Physics 6091/1 Page 6 of 17 9 A box has an internal volume of 1000 cm3. When a solid object is placed in the closed box, the volume occupied by the air in the box is 520 cm3. The density of the object is 8.00 g / cm3. What is the mass of the object? A 60.0 g B 3840 g C 4160 g D 8000 g 10 Which statement about hydraulic machines is not true? A Liquids are used because they are almost incompressible. B Hydraulic machines can multiply the effects of the effort force. C Hydraulic machines can give larger energy outputs than the actual work done. D Changes in liquid pressure are transmitted equally to all parts of the liquid. 11 The diagram shows a barometer containing a liquid of density 1200 kg / m3 above the mercury column. The density of mercury is 13 600 kg / m3 and the atmospheric pressure is 76 cm Hg. What is the height of the liquid? A 2.0 cm B 22.7 cm C 26.0 cm D 76.0 cm 12 A car with a total mass 850 kg is travelling along a road at a constant speed of 25 m/s. The driver applies the brakes to slow down the car to 12 m/s with a constant deceleration in 5.0 s. What is the work done against the braking force? A 2.21 kJ B 11 kJ C 110 kJ D 204 kJ

Nan Hua High School Preliminary Examination 2025 Physics 6091/1 Page 7 of 17 13 A 12 kg bucket of sand was moved 8.0 m vertically in 4.0 s by a 0.40 kW motor. What is the efficiency of the motor? A 41.6 % B 60.0 % C 96.0 % D 167 % 14 Some gas is trapped in a closed container. The gas is cooled and the volume of the container is kept constant. What happens to the gas molecules? A They collide with the walls more often. B They contract. C They get closer together. D They move more slowly. 15 Four bars, all of exactly the same size, are each placed with one end in boiling water. The times taken for the temperature of the other end to increase by 2 °C are measured. material of bar time for 2 °C rise / s aluminium 10 copper 5 cork 800 styrofoam 1200 To make a large metal tank with the least heat loss, which materials should be used for the walls of the tank and its insulation? tank insulation A aluminium cork B aluminium styrofoam C copper cork D copper styrofoam 16 The outer surface of an electric kettle is always kept polish and shiny. What is the purpose of this? A To stop energy loss by radiation and conduction. B To reflect any radiation incident on its outer surface. C To reduce energy loss by thermal conduction. D To be a poor emitter so as to reduce energy loss.

Nan Hua High School Preliminary Examination 2025 Physics 6091/1 Page 8 of 17 17 24 000 J of energy is required to increase the temperature of 2.0 kg of water by 3.0 K. What is the heat capacity of the water? A 4000 J / K B 6000 J / K C 8000 J / K D 12 000 J / K 18 The graph shows the change in temperature when heat is supplied at 200 W to 1.0 kg of the substance. What is the specific latent heat of vaporization of the substance? A 4000 J / kg B 6000 J / kg C 240 000 J / kg D 360 000 J / kg 19 Which statement about water is correct? A Evaporation does not take place when water is at 100 °C. B Boiling only takes place on the surface of the water C Steam causes less severe burn than boiling water D Solidified water has less internal energy than water. 20 Springs and ropes can both be used to illustrate wave motion. Which statement is correct? A Ropes are onl