Dunman 2025 Physics 6091 Prelim P1

DUNMAN SECONDARY SCHOOL CANDIDATE NAME CLASS INDEX NUMBER PRELIMINARY EXAMINATION 2025 SECONDARY 4 EXPRESS PHYSICS 6091/01 Paper 1 Multiple Choice 26 August 2025 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and index number on the Answer Sheet in the spaces provided unless this has been done for you. 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 separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. 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 22 printed pages.

2 6091/01/PRELIM/4EXP/2025 1 A pendulum has a period of 2.0 s. A stopwatch is started when the pendulum is vertical and is moving to the right, as shown in the diagram. Which diagram shows the position and direction of the pendulum 5.0 s later? A B C D direction direction direction direction direction

3 6091/01/PRELIM/4EXP/2025 2 A small cylinder is rolled along a ruler and completes four full turns as shown in the diagram. The diagram is not drawn to scale. What is the circumference of the cylinder? A 2.2 cm B 4.4 cm C 8.8 cm D 10.2 cm 3 A woman runs 2.0 km from P to R in 20 minutes and then rests at R for 10 minutes. She then takes 10 minutes to run 2.4 km from R to S. What is her average velocity for the journey from P to S? A 0.040 km / minute B 0.053 km / minute C 0.090 km / minute D 0.120 km / minute 4 An object falls from rest through air. Which statement is correct if the object has not reached terminal velocity? A Both its velocity and acceleration decrease. B Its velocity decreases and its acceleration is constant. C Its velocity increases and its acceleration decreases. D Its velocity increases and its acceleration is constant. mark on cylinder start finish 8 5 6 7 cm 11 9 10 13 12 15 14 four full turns P R S 2.0 km 2.4 km 1.6 km

4 6091/01/PRELIM/4EXP/2025 5 A pulling force F, increasing from zero, is applied on a block placed on a rough horizontal surface. A graph of friction f against the pulling force F is plotted as shown. What is the value of F when the block starts to move? A 0 N B 2 N C 8 N D 10 N 6 The mass of object X is less than the mass of object Y. The objects contain different amounts of matter and have different inertias. Which row is correct? less amount of matter lower inertia A X X B X Y C Y X D Y Y 7 A large hook sticks into a pencil. The hook and pencil stay balanced on the edge of a table, as shown in the diagram. Where is the centre of gravity of the hook and pencil? F f f / N F / N 0 10 10 pencil table large hook

5 6091/01/PRELIM/4EXP/2025 8 The diagram shows a muscle and some bones in a human’s arm. The hand holds a load of weight 55 N. The elbow acts as a pivot and the tension in the muscle keeps the lower part of the arm horizontal. What is the tension in the muscle due to the load? A 280 N B 390 N C 440 N D 2200 N 9 The diagrams drawn to the same scale, show the vertical sections of a set of circular vessels. Each vessel contains the same depth of water. Which statement is correct? A The water exerts the greatest pressure on the base of vessel P. B The water exerts the greatest pressure on the base of vessel S. C The water exerts the same force on the base of each vessel. D The water exerts the same pressure on the base of each vessel. P Q R S tension in muscle elbow (pivot) load hand 5.0 cm 35 cm 55 N

6 6091/01/PRELIM/4EXP/2025 10 A forked tube contains air in one branch and a vacuum in the other as shown. What is the pressure of the enclosed air? A d cm Hg B (h – d) cm Hg C (h – k) cm Hg D k cm Hg 11 A single metal bolt has a mass of 38 g. Three of such bolts are immersed in a measuring cylinder that contains 30 cm3 of water. The reading on the measuring cylinder rises to 42 cm3. What is the density of the metal? A 0.90 g/cm3 B 1.3 g/cm3 C 3.2 g/cm3 D 9.5 g/cm3 12 A rocket of mass M when empty carries a mass M of fuel. The rocket and fuel travel at speed v. The engine of the rocket is fired and all the fuel is expelled until no fuel is left. The speed of the rocket increases to 2v. What happens to the kinetic energy of the rocket? A It doubles. B It halves. C It increases by a factor of four. D It remains the same. vacuum mercury h k d enclosed air

7 6091/01/PRELIM/4EXP/2025 13 The diagram shows a block being pulled up along a ramp by a rope. The block has weight W and the rope is pulled with force F. The block moves a distance XZ and is raised throught a height YZ. What is the work done on the block by the rope? A F x XZ B F x YZ C W x XY D W x XZ 14 The size of a balloon increases when it is left under the Sun. Why does this happen? A The air molecules inside the balloon are bigger when it is heated. B The air molecules inside the balloon move faster when it is heated. C The air molecules inside the balloon move outwards when it is heated. D The number of air molecules inside the balloon increases when it is heated. force F weight W ramp block rope X Y Z

8 6091/01/PRELIM/4EXP/2025 15 In aluminium foils, one side is shinier than the other. They are commonly used to wrap sweet potatoes cooked in a barbeque fire. The diagram shows a sweet potato being wrapped in aluminium foil. How should the sweet potato be wrapped in the aluminium foil to allow it to be cooked faster when placed in the fire? A The dull side should be on the outside because it is a better absorber of radiation. B The dull side should be on the outside because it is a better conductor of heat. C The shiny side should be on the outside because it is a better absorber of radiation. D The shiny side should be on the outside because it is a better conductor of heat. 16 On a hot day, a cold drink in a bottle can be kept cool by standing it in a bowl of water and placing a wet cloth over it. Why will the drink be kept cool? A Hot air cannot escape from the bottle. B The cloth conducts heat from the bottle into the water. C The drink cannot evaporate from the bottle. D Water evaporating from the cloth cools the drink. wet cloth drink water outside of aluminium foil inside of aluminium foil sweet potato aluminium foil

9 6091/01/PRELIM/4EXP/2025 17 Two liquids P and Q are placed in two similar polystyrene cups. Initially, both liquids are at the same temperature and have equal masses. They are simultaneously heated by identical immersion heaters. If liquid P has a lower specific heat capacity, which result(s) will be observed? 1 Liquid P will be boiled away before liquid Q does. 2 Liquid P will reach its boiling point first. 3 The temperature of liquid P will rise more rapidly than liquid Q. A 1 only B 1, 2 and 3 C 2 only D 3 only 18 X and Y are two points 20 m apart on a string. Point X is vibrated 5 times in one second and the first resulting wave reaches Y two seconds later. What is the period and wavelength of the wave? period / s wavelength / m A 0.20 2.0 B 0.20 4.0 C 2.5 2.0 D 2.5 4.0 X Y 20 m

10 6091/01/PRELIM/4EXP/2025 19 Refraction occurs when wa