2024 CCHY Merged

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 s