RGS 2021 Y3 PHY EYA

This Question Paper consists of 16 printed pages including the cover page. [Turn Over INSTRUCTIONS TO CANDIDATES Write your name, class and register number in the spaces provided. Write in dark blue or black ink. For Section A, indicate your answers on the separate Answer Sheet provided. Answer all other questions in the spaces provided. All quantitative answers should include appropriate units. You are advised to show all your working in a clear and orderly manner, as more marks are awarded for sound use of Physics than for correct answers. INFORMATION FOR CANDIDATES Assume g = 9.81 N kg-1 unless stated otherwise. The number of marks is given in brackets [ ] at the end of each question or part question. You may be penalised for incorrect use of units and/or not giving quantitative answers to an appropriate number of significant figures. The total number of marks for this paper is 80 and the weighting is 40%. Raffles Girls’ School (SECONDARY) Name: Class: Register No: PHYSICS YEAR THREE End-of-Year Assessment Thursday 7 October 2021 2 hours Parent’s / guardian’s Name: Signature: Date: Established in 1879 For examiner’s use Question / Section Marks Obtained Section A / 20 1-20 Section B / 60 21 / 9 22 / 8 23 / 10 24 / 10 25 / 11 26 / 4 27 / 8 units / sig.fig. Total / 80

Raffles Girls’ School (Secondary) End-of-Year Assessment 2 SECTION A (20 marks) Answer ALL questions. For each question, there are four possible answers (A, B, C and D). Choose the most appropriate answer and record your choice on the separate Answer Sheet provided. 1 A piece of paper is allowed to fall through a vacuum in an experiment. Which row describes the acceleration and velocity of the paper? acceleration velocity A constant constant B constant increasing C increasing constant D increasing increasing 2 Which graph shows the acceleration-time graph of an eraser which is dropped from a desk? 3 The diagram shows how the displacement of a ball varies with time during a game. Which part of the graph shows the highest speed? 4 Which of the following is a non-contact force? A friction B normal C tension D weight acceleration time A B C D displacement time A B C D

Raffles Girls’ School (Secondary) End-of-Year Assessment [Turn Over 3 5 A parachutist falls with terminal velocity. Which of the following free- body diagrams correctly shows the forces acting on him? A B C D 6 A box of mass 0. 20 kg was pushed along a horizontal surface with a constant acceleration of 0.50 m s-2. If it was pushed with a force of 0.30 N, what is the resistive force acting on the box? A 0.10 N B 0.20 N C 0.30 N D 0.40 N 7 Which statement best explains Newton’s first law? A An object at rest will remain at rest. B An object does not undergo acceleration when resultant force acting on it is zero. C When an object exerts a force on another object, it will experience an equal and opposite force. D The magnitude of an object’s acceleration is directly proportional to the resultant force acting on it. 8 When a car accelerates up a hill, which of the following best describes what happens? A The car gains both gravitational potential energy and kinetic energy. B The car gains gravitational potential energy but loses kinetic energy. C The car gains kinetic energy but loses gravitational potential energy. D The care loses both gravitational potential energy and kinetic energy. 9 A man weighing 700 N runs up a flight of steps 6.0 m in height in 3.0 s. What is the average power generated by the man? A 230 W B 350 W C 1400 W D 13000 W 10 What are the energy changes in a hydroelectric power production? A electrical energy  gravitational potential energy  kinetic energy B electrical energy  kinetic energy  gravitational potential energy C gravitational potential energy  kinetic energy  electrical energy D kinetic energy  gravitational potential energy  electrical energy

Raffles Girls’ School (Secondary) End-of-Year Assessment 4 11 520 kJ of thermal energy was released when a vehicle braked to a stop. If the vehicle has a mass of 1800 kg, what is the speed of the vehicle just before the brakes were applied? A 12 m s-1 B 16 m s-1 C 17 m s-1 D 24 m s-1 12 Which object is most stable? A B C D 13 A square cardboard of side 10 cm is suspended from point P, a midpoint between two adjacent corners. It is pushed by a force of 5.0 N as shown in the diagram below. What is the moment about P due to the force? A 0 N cm B 25 N cm C 50 N cm D 56 N cm 14 The diagram below shows a hanging toy for babies. Which of the following shows the weight of each shape in increasing order? A cloud < raindrop < heart B heart < cloud < raindrop C heart < raindrop < cloud D raindrop < cloud < heart 10 cm 5.0 N P

Raffles Girls’ School (Secondary) End-of-Year Assessment [Turn Over 5 15 Which of the following waves is most suitable for destroying cancer cells? A gamma rays B ultrasonic waves C ultraviolet rays D X- rays 16 Which of the following graphs shows the correct relationship between the frequency f of an electromagnetic wave and its wavelength λ? A B C D 17 Which of the following waves consist of compressions and rarefactions? A infra-red waves B radio waves C ultrasound waves D visible light f λ 0 f λ 0 f λ 0 f λ 0

Raffles Girls’ School (Secondary) End-of-Year Assessment 6 18 The following diagram shows circular wavefronts radiating from a point source O. If the time taken for a wavelength to travel from P to Q is 10 s, and the wavelength of the waves is 2.0 m, what is the speed of the waves? A 0.20 m s -1 B 0.80 m s-1 C 1.0 m s-1 D 1.3 m s-1 19 The diagram shows a light ray entering a glass prism. The light ray strikes the edge of the prism at X, at an angle of incidence greater than the critical angle. In which direction does the ray leave X? A D C B light ray X

Raffles Girls’ School (Secondary) End-of-Year Assessment [Turn Over 7 20 The diagram shows a light ray travelling from medium X to medium Y. Which row compares medium X with medium Y correctly? medium X medium Y A light travels faster higher refractive index B light travels faster lower refractive index C light travels slower higher refractive index D light travels slower lower refractive index medium Y medium X

Raffles Girls’ School (Secondary) End-of-Year Assessment 8 SECTION B (60 marks) Answer ALL questions. 21 Fig. 21.1 shows how the height of a falling object A varies with time. Fig. 21.1 (a) State the time during which the object is travelling with terminal velocity. [1] …………………………………………………………………………………………………………… (b) Another object B falls from a height of 15.0 m and experiences the same terminal velocity as object A. Draw on Fig. 21.1 to show how the height of B varies with time. [1] (c) Object C falls from a tall building. Fig. 21.2 shows how the speed of a falling object varies until it reaches the ground. Fig. 21.2 Calculate the distance travelled in the last 0.5 s of its motion. [2] height / m 0 2.0 4.0 6.0 8.0 10.0 time / s 40.0 20.0 30.0 10.0 0 speed / m s-1 time / s 0 0.5 1.0 1.5 2.0 2.5 3.0 5.0 0 20.0 15.0 10.0

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