GESS 2026 Physics P1 QP + MS

This paper consists of 16 pages including the cover page. GAN ENG SENG SCHOOL Preliminary Examination 2026 CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 1 Multiple Choice Sec 4 Express 6091/01 14 September 2026 1 hour Additional Materials: OTAS READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the OTAS in the spaces provided unless this has been done for you. There are forty questions in 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 OTAS. Read the instructions on the OTAS 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. Total Marks 40

GESS 4EXP PHY P1 Prelim 26 TYL 2 1 Which expression contains only SI base units? A kg m2 s-3 A-1 B kg m2 s-2 C-1 C J A-1 s-1 D N m A-1 s-1 2 A boat crosses a river and arrives at a point due north of its starting point. The boat has a speed of V in still water. A wind is blowing from east to we st causing the boat to move with a speed of W in the same direction. Which diagram represents the resultant velocity R of the boat? 3 A stationary object moves a distance s with a uniform acceleration a. What is the time taken for it to move the distance s? A (s / a)1/2 B (2s / a)1/2 C s / 2a D s / a 4 The diagram shows three displacement-time graphs, P, Q and R. P Q R Which statement is correct? A Graph P has the highest instantaneous velocity. B Graph Q has the highest average velocity. C Graph R has the highest average velocity. D All three graphs have the same average velocity. displacement / m time / s 20 4 displacement / m time / s 20 4 displacement / m time / s 20 4

GESS 4EXP PHY P1 Prelim 26 TYL 3 5 A car is accelerating along a level road. Only the front wheels of the car are driven by the engine. Which diagram shows the direction of frictional force F1 on the front wheels and the direction of frictional force F2 on the rear wheels? A B C D 6 An object of weight W moves to the left on a smooth horizontal surface at steady velocity. A horizontal force, F1, acts on the object to the left and a horizontal force, F2, acts on it to the right. Which statement is correct? A F1 > F2 B F1 + F2 = W C F1 = F2 and is an action-reaction pair. D F1 = F2 but is not an action-reaction pair. 7 Matthew is carrying a load on the end of a light stick. He rests the stick on his shoulder at point P, which acts as a pivot. He keeps the stick in balan ce by exerting a downward force F with his hand as shown. What upward force does his shoulder exert on the stick? A 16 N B 24 N C 40 N D 64 N

GESS 4EXP PHY P1 Prelim 26 TYL 4 8 The diagram shows the shape of a solid object with its centre of gravity marked. Which action makes the object less stable? A Add an extra weight on its top surface. B Make the object from a less dense material. C Move it to a place where the gravitational field is weaker. D Turn it through 180  so that its top surface is now resting on the bench. 9 A fish in the ocean releases a bubble of gas. The bubble rises to the surface as shown. Which diagram shows how the pressure P of the gas in the bubble varies with its depth d below the surface of the ocean? A B C D

GESS 4EXP PHY P1 Prelim 26 TYL 5 10 Two nickel spheres M and N are at rest on a frictionless surface. The same force F acts on M and on N for the same time t. The volume of N is less than that of M. Which quantity is the same for both spheres? A density B energy C mass D weight 11 A stone enters a deep pool at high speed. It slows down as it moves towards the bottom of the pool. What is the energy transfer as the stone moves downwards through the water? A Energy is transferred mechanically from the gravitational potential store to kinetic store and internal store. B Energy is transferred mechanically from the gravitational potential store to kinetic store and by heating from kinetic store to internal store. C Energy is transferred mechanically from gravitational pot ential store and kinetic store to internal store. D Energy is transferred mechanically from kinetic store to gravitational potential store and internal store. 12 A train of mass 40 000 kg is moving along a straight track. The velocity of the train decreases from 30 m/s to 25 m/s. How much work is done to slow the train down? A 0.1 MJ B 0.5 MJ C 5.5 MJ D 11 MJ

GESS 4EXP PHY P1 Prelim 26 TYL 6 13 Gas inside a cylinder is cooled down slowly to a lower temperature and the piston moves inwards. As the volume decreases, the pressure of the gas remains constant. What happens to the speed of the gas molecules and their rate of collision with the piston? speed of molecules rate of collision A B C D decreases decreases stays the same stays the same decreases increases decreases increases 14 The water in a swimming pool has a temperature of 28 C and the hot water in a kettle has a temperature of 80 C. Where does the water have the greater total energy in internal store and where do the water molecules have the greater average energy in kinetic store? greater total energy in internal store greater average energy in kinetic store A B C D in the kettle in the kettle in the pool in the pool in the kettle in the pool in the kettle in the pool

GESS 4EXP PHY P1 Prelim 26 TYL 7 15 Water at 0 C contracts as it is heated to 4 C. Three students make statements about water. Aricia As water cools from 4 C to 0 C, each molecule expands. Bliss Convection currents do not occur in water between 0 C and 4 C. Carla Water at 3 C sinks in water at 1 C. Which student(s) is/are correct? A Aricia B Bliss C Aricia and Carla D Carla 16 In 2018, a junior football team became trapped inside the flooded Tham Luang Nang Non cave in Chiang Rai, Thailand for 17 days. Upon rescued, the boys were each wrapped with a thin sheet of shiny and silver material. What was the effect of the sheet being shiny and silver rather than dull and black? A It reflected less radiation from the boys, and the boys lost heat more quickly. B It reflected less radiation from the boys, and the boys lost heat more slowly. C It reflected more radiation from the boys, and the boys lost heat more quickly. D It reflected more radiation from the boys, and the boys lost heat more slowly. 17 A block of aluminium is at room temperature. Which row describes a bigger block of aluminium at the same temperature? internal energy heat capacity specific heat capacity A B C D more same more same same more more same more more same same

GESS 4EXP PHY P1 Prelim 26 TYL 8 18 The energy needed to change a mass m of water to steam at 100 C is L. What does L represent? A the latent heat of fusion of a mass m of water B the latent heat of vaporisation of a mass m of water C the specific latent heat of fusion of water D the specific latent heat of vaporisation of water 19 Which graph shows how the frequency of a wave is related to its period? A B C D