MSHS 2025 PHY PRELIM P1 QP

[Turn over Class/ Index Number / Centre Number/ ‘O’ Level Index Number / Name MARIS STELLA HIGH SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR PHYSICS 6091/01 Paper 1 Multiple Choice 3 September 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 class, index number, Centre number, O level index number and name in the spaces at the top of this page. 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 question booklet. The use of an approved scientific calculator is expected, where appropriate. The total marks for this paper is 40. At the end of the examination, hand in the following separately: (1) Multiple Choice Answer Sheet (2) Question Paper This document consists of 20 printed pages.

2 1 Max Planck’s equation of radiation states that the energy , E, of electromagnetic waves is equal to the product of Planck’s constant, h and the frequency, f of the electromagnetic wave. The equation is 𝐸=ℎ𝑓. What is the unit of Planck’s constant, h, expressed as SI base units? A J / Hz B m s2 / kg3 C kg m2 / s D kg m3 / s2 2 An air-traffic control centre at Seletar looks after aircraft within a 400 km radius of Singapore. A small aircraft, flying due north at 300 km/h, passes over Seletar at 12:00pm. It carries enough fuel for another 550 km of flying. At 12:30pm, air traffic control instructs the pilot to turn through 45° onto a north-westerly bearing. The aircraft continues at 300 km/h until 1:30pm. At 1:30pm the aircraft is still 150 km from its destination. What is the location of the aircraft and which action is required? location of aircraft action required A outside Seletar’s air-traffic control space carry on to destination B outside Seletar’s air-traffic control space make an emergency landing before getting to destination due to insufficient fuel C within Seletar’s air-traffic control space carry on to destination D within Seletar’s air-traffic control space make an emergency landing before getting to destination due to insufficient fuel Seletar not to scale N

3 [Turn over 3 Which of the following distance-time graphs best describes a skydiver jumping off a plane till reaching terminal velocity? A B C D 4 At the top of a cliff of height 100 m, a girl throws a rock upwards with a velocity of 15 m/s. How much time later will the rock hit the bottom of the cliff? Ignore the effects of air resistance and take acceleration due to gravity as g = 10 m/s2. A 6.2 s B 6.8 s C 7.5 s D 8.2 s 5 P, Q and R are three identical blocks resting on a smooth surface as shown below. The blocks are joined by strings with tensions T1 and T2 when a force of 30 N is applied at one end as shown in the diagram below. What are the tensions T1, and T2 in the strings? T1 T2 A 15 N 15 N B 30 N 30 N C 10 N 20 N D 10 N 15 N P Q R

4 6 Two objects, A (mass 6.0 kg) and B (mass 4.0 kg), are stacked one on top of the other as shown. B is pulled by a horizontal force of 20 N and all surfaces are frictionless. What is the acceleration of A? A 0 m/s2 B 2.0 m/s2 C 3.3 m/s2 D 5.0 m/s2 7 A sealed tank filled to the brim with water is mounted on wheels. A balloon is fixed at the base of the tank. The tank is initially moving at a constant velocity. Which statement correctly describes the motion of the balloon when the tank starts to slow down? A The balloon will move backward. B The balloon will move forward. C The balloon will remain in its original position. D The balloon will start to oscillate back and forth. tank of water constant velocity balloon string fixed to the base of the tank balloon A A B 20 N

5 [Turn over 8 Four cubes P, Q, R and S are used to balance a uniform beam pivoted about its mid-point. They have the same volume but different masses. Which cube is the heaviest? A P B Q C R D S 9 The diagrams show a force of magnitude F being applied to the same door handle. Which diagram shows the greatest moment? A B C D 10 The diagram shows a mercury barometer. Given that the height of the mercury barometer is h when the atmospheric pressure is 100 000 Pa, what is the pressure at point X? A 20 000 Pa B 80 000 Pa C 120 000 Pa D 180 000 Pa P P P Q Q R R S h  X h 5⁄

6 11 The figure below shows a box of mass 6.0 kg being dragged to the top of a slope at a constant speed by a constant force F. Given that the total work done against friction is 160 J and the gravitational field strength is 10 N/kg, what is the value of force F? A 16 N B 20 N C 52 N D 60 N 12 A man can either take an escalator or a lift to travel up between two floors in a hotel. The escalator takes 20 seconds to carry the man between the two floors. The useful work done against gravity is W. The useful power developed is P. The lift takes 30 seconds to carry the same man between the same two floors. How much useful work against gravity is done by the lift, and how much useful power is developed by the lift? useful work done against gravity by lift useful power developed by lift A more than W less than P B more than W P C W less than P D W P

7 [Turn over 13 When a hot gas is left to cool, its internal energy decreases. What causes this? A a decrease in the kinetic energy of the gas particles B a decrease in the gravitational potential energy of the gas particles C an increase in the average speed of the gas particles D an increase in the average distance of separation of the gas particles 14 An experiment is carried out to investigate the rate of transfer of internal energy by conduction and radiation through different mediums – mercury, vacuum and wood. Which mediums show the greatest rate of transfer of internal energy by conduction and radiation? conduction radiation A mercury vacuum B vacuum mercury C vacuum wood D wood vacuum

8 15 A student filled an upright ring-shaped container completely with warm water. He then placed a pack of ice at a corner of the container. Which is a correct illustration of the convection current that was set up? A B C D 16 Two different liquids, P and Q with the same mass and initial temperature, are heated by the same heat source. Liquid P reaches a temperature of 80°C faster than liquid Q. This shows that A liquid P has a higher specific heat capacity than liquid Q. B liquid P has a lower specific heat capacity than liquid Q. C liquid P has a higher specific heat of vapourisation than liquid Q. D liquid P has a lower specific heat of vapourisation than liquid Q. 17 A wave in the sea collides with a cliff. A crest of the wave hits the cliff once every 6.0 s. The horizontal distance between a crest and the adjacent trough of the wave is 4.5 m. What is the speed of the wave? A 0.67 m / s B 0.75 m / s C 1.3 m / s D 1.5 m / s ice pack water lid

9 [Turn over 18 The figure below shows two waveforms