2024 MGS Merged

Page 2 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 1 Which line in the table correctly indicates the prefixes micro, nano and giga? × 10-6 ×10-9 ×109 A giga micro nano B giga nano micro C nano micro giga D micro nano giga 2 Which equation contains two vector quantities? A acceleration = change in velocity time taken B average speed = distance travelled time taken C density = mass volume D volume = length × width × height

Page 3 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 3 A car is traveling at constant speed. Brakes are applied for a short period of time and the car continues at a lower constant speed. Which displacement-time graph shows the motion of the car? 4 A box of mass 3.0 kg is initially at rest on a horizontal rough surface. Three parallel horizontal forces of magnitude 2.0 N, 3.0 N and 4.0 N act on the box in the same direction. Friction acts between the box and the ground is 1.5 N. What is the minimum acceleration of the box? A 0.25 m/s2 B 0.50 m/s2 C 1.0 m/s2 D 2.5 m/s2 5 The gravitational field strength on the Moon is one-sixth that on the Earth. An astronaut returns from the Moon to the Earth with a specimen of a moon rock. How would the moon’s rock density and mass change? density mass A higher on Earth higher on Earth B higher on Earth same on Earth and Moon C same on Earth and Moon higher on Earth D same on Earth and Moon same on Earth and Moon displacement displacement displacement displacement

Page 4 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 6 The diagram shows 2 manometers containing mercury. Both are placed in the same room. The manometer on the left is connected to a sealed container filled with gas. The manometer on the right is sealed at one end as shown. All measurements are in cm. What is the pressure of gas in cmHg? A (h 1 + h2) B (h 1 + h3) C (h 1 + h2 – h3) D (h 2 – h1) 7 A cylindrical block rests on a rectangular block. The area of the cylindrical block in contact with the rectangular block is A1 and the area of the rectangular block facing up is A2. The weight of the cylindrical block is W 1 and the weight of the rectangular block is W2. What is the pressure exerted on the cylindrical block by the rectangular block? A W1 A1 B W1 A2 C W2 A1 D W2 A2 area A1 of cylindrical block area A2 of rectangular block

Page 5 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 8 The diagram shows an ornament hung from a ceiling. It consists of objects X, Y and Z suspended from light rods A and B. The masses of X, Y and Z are such that the rods are horizontal. Which row gives a possible combination of the masses X, Y and Z? mass of X / g mass of Y / g mass of Z / g A 100 75 25 B 50 75 25 C 48 36 12 D 16 36 12 9 The diagram shows the rest position of a balancing toy near the edge of a table. Which position is most likely to be the center of gravity of the toy? 75 cm 25 cm 25 cm 75 cm rod A rod B Y X Z horse table ceilin

Page 6 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 10 Electromagnetic waves from the Sun are absorbed by a solar panel. These waves transfer energy electrically to a portable traffic light system. A few solar panels with a total area 12 m2 were used to operate the traffic light system . 1.0 m2 of a panel receives 0.85 kJ of energy via electromagnetic waves from the Sun in 1.0 s. If the efficiency of the panels is 16 %, how much power do they transfer electrically? A 1.6 kW B 2.2 kW C 64 kW D 160 kW 11 A barrel of mass 50 kg is loaded onto the back of a lorry 1.6 m high by pushing it up a smooth plank 3.4 m long. The gravitational field strength, g = 10 N/kg. What is the minimum work done on the barrel? A 80 J B 170 J C 800 J D 1700 J 12 A student investigates the changes that take place as molten wax solidifies. Which of the following correctly describe these changes?

Page 7 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 A A transfer of energy and a change in temperature B A transfer of energy but no change in temperature C No transfer of energy and no change in temperature D No transfer of energy but a change in temperature 13 Wiping the body of a patient who has a high fever with a wet towel makes use of the cooling effect of evaporation. When liquid evaporates, some liquid molecules in the liquid escape. Which molecules in the liquid escape? A the molecules at the bottom of the liquid with less energy than others B the molecules at the bottom of the liquid with more energy than others C the molecules at the surface of the liquid with less energy than others D the molecules at the surface of the liquid with more energy than others

Page 8 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 14 Water in a glass pot is heated by a gas stove. Which of the following explains how the energy in the internal store of the glass pot increases? A Glass molecules at the bottom surface of the pot move around and transfer energy to glass molecules on the upper surface by collisions. B Glass molecules at the bottom surface of the pot move to the upper surface of the pot. C Glass molecules at the bottom surface of the pot radiate microwaves which pass through the upper surface of the pot. D Glass m olecules at the bottom surface of the pot vibrate more vigorously and transfer energy to the neighbouring glass molecules. 15 A vacuum flask contains a hot liquid. The diagram shows a section of the flask’s double wall. Which colour(s) for surface X and for surface Y will reduce the rate of decrease of energy in the internal store of the liquid? X Y A B C D black black silver silver black silver black silver water fire hot liquid X Y hot liquid glass pot vacuum air outside double wall

Page 9 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 16 Different amounts of energy are transferred to the internal store of the iron blocks of different masses. Which block experiences the greatest temperature change? mass of block / kg energy supplied / J A B C D 1.0 1.5 2.0 2.5 120 150 180 210 17 Water from two identical containers is mixed. One container contains 2.0 kg of water at 25°C and the other contains 3.0 kg of water at 90°C. What is the final temperature of the mixture? (Assume there is no change to the energy in the internal store of the surroundings) A 32°C B 46°C C 64°C D 78°C 18 A vertical stick is dipped up and down in the water at point P. In two seconds, three wave crests are produced on the surface of the water. Which statement is correct? A Distance X is the amplitude of the waves. B Distance Y is the wavelength of the waves. C Each circle represents a wavefront. D The frequency of the waves is 3 Hz.

Page 10 of 16 Methodist Girls’ School Physics Paper 1 Sec 4 Preliminary Examination 2024 19 An observer hears a clap of thunder 3.0 s after seeing the flash of lightning. The speed of sound in air is 330 m/s. How far from the observer was the lightning? A 110 m B 330 m C 990 m D 1980 m 20 Bar magnets and various non-magnetic and demagnetised metal bars are placed in the differe