2024 CCHY P1 P2 QP + MS

2 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 1 Which is a vector quantity? A a mass of 2.0 kg B a temperature of -10 °C C a weight of 15 N D an average speed of 20 m/s 2 What must change when a body is accelerating? A the force acting on the body B the mass of the body C the speed of the body D the velocity of the body 3 The graph shows how the height of an object above the ground changes with time. What is the terminal velocity of the object? A 1.0 m/s B 1.3 m/s C 1.6 m/s D 2.0 m/s

3 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 4 The diagram shows a material with dimensions 5.0 cm × 4.0 cm × 2.0 cm. It has a mass of 100 g. What is the density of the material? A 0.40 g/cm3 B 2.5 g/cm3 C 5.0 g/cm3 D 10 g/cm3 5 Two men simultaneously jump out of an airplane at the same time. One of the men is in free-fall and the other man opens his parachute. Why is the man in free-fall moving faster than the parachutist? A The man in free-fall experiences greater air resistance. B The man in free-fall has a greater mass. C The parachutist experiences greater air resistance. D The parachutist has not reached terminal velocity. 4.0 cm 2.0 cm 5.0 cm

4 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 30 cm 30 cm 15 N trapdoor ledge hinge weight 6 A body resists changes to its motion. Which property of a body is responsible for this? A density B gravitational potential energy C inertia D kinetic energy 7 A trapdoor is hinged along one side and, when closed, is supported on the other side by a ledge. When the trapdoor is closed, the ledge exerts an upward force of 15 N on the trapdoor. The gravitational field strength is 10 N/kg. What is the mass of the trapdoor? A 1.5 kg B 3.0 kg C 30 kg D 150 kg 8 What affects the stability of an object? A its base area and location of its centre of gravity B its weight and its base area C only the location of its centre of gravity D only its weight

5 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 9 Objects of different weights are placed on a rigid, horizontal surface. Which row shows the correct pressure acting on the surface? weight / N area in contact / m2 pressure / Pa A 10 0.1 1 B 20 0.2 0.01 C 30 0.1 300 D 40 0.2 8 10 The diagram shows a hydraulic pump. Which of the following is correct? A The force F is the same as the weight of the load. B The force F is greater than the weight of the load. C The pressure on piston P is the same as the pressure on piston Q. D The pressure on piston P is smaller than the pressure on piston Q.

6 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 11 Two beakers X and Y are filled to the same level with water. The area of the base of X is less than that of Y. X Y Which statement is correct? A The force due to the liquid on the base of X is greater than the force on the base of Y. B The force due to the liquid on the base of X is the same as the force on the base of Y. C The pressure on the base of X is less than the pressure on the base of Y. D The pressure on the base of X is the same as the pressure on the base of Y. 12 A small rock is dropped vertically from a height of 1.0 m. The gravitational field strength is 10 N/kg. If air resistance is negligible and there is no transfer of thermal energy to the surrounding air molecules, what is the speed of the rock just before it hits the ground? A 4.5 m/s B 5.3 m/s C 6.0 m/s D It cannot be determined.

7 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over h l W d F 13 A constant force F pulls a block up a slope shown. How much work is done in pulling the block up the slope? A F x h B F x l C W x d D W x l 14 One end of a copper rod is heated. Which statement describes how transfer of thermal energy happens in the copper? A Energetic copper atoms move from the cooler end to the hotter end. B Energetic copper atoms move from the hotter end to the cooler end. C Energetic free electrons move from the cooler end to the hotter end. D Energetic free electrons move from the hotter end to the cooler end. 15 What is the colour and the texture of a good absorber of infrared radiation? A black and shiny B black and dull C white and shiny D white and dull

8 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 16 A dish of liquid is left on a laboratory bench. Some of the liquid evaporates. What happens to the remaining liquid and why? A The liquid cools because the liquid molecules have more potential energy than gas molecules. B The liquid cools because the faster-moving molecules escape. C The liquid warms because liquid molecules have less potential energy than gas molecules. D The liquid warms because slower-moving molecules are left behind. 17 Equal masses of copper and water are heated to the same temperature. As they cool down, the copper and the water lose thermal energy at the same rate. The temperature of the copper falls faster. Why is this? A Copper has a larger specific heat capacity. B Copper has a larger specific latent heat. C Copper has a smaller specific heat capacity. D Copper has a smaller specific latent heat. 18 The temperature of a gas is increased. Which property of the gas must also increase? A volume B pressure C density D internal energy

9 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 19 The graph is the temperature-time graph for a sample of wax that is heated so that it melts. The mass of the wax is 0.20 kg. Thermal energy is supplied to the wax at a constant rate of 12 kJ/min. What is the specific latent heat of fusion of the wax? A 180 J/g B 240 J/g C 480 J/g D 600 J/g

10 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 20 A double-glazed window has two panes of glass with a layer of air in between them. Thermal energy is transferred by conduction and convection through the layer of air. The amount of conduction and convection varies with the thickness of the layer of the air, as shown in the graph. Which thickness of layer of air results in the least transfer of thermal energy, and why? A 0.45 cm because there is not much convection. B 1.0 cm because the total thermal energy transfer is least. C 1.5 cm because the total thermal energy transfer is small and conduction is low. D 2.0 cm because there is little conduction.

11 2024 CCHY Preliminary Examination Physics (6091/01) / Sec 4 Express [Turn Over 21 An eye views an object O by reflection in a plane mirror. Which is the correct ray diagram? A B C D 22 What is the refractive index of a medium? A The ratio of the speed of light in air to speed of light in the medium. B The ratio of the speed of light in the medium t