2018 S4 EOY P1 2018 S4 EOY P1 2018 S4 EOY P1 1 / 30 2018 S4 EOY P1 Q01 It takes 27.6 s for a pendulum to swing from O to P and back again forty times as shown below. What is the period of the pendulum? 4.60 s 1.38 s 0.345 s 0.690 s 2 / 30 2018 S4 EOY P1 Q02 A 120 m long MRT train stops at a station with its front end in line with a signal- post. Later it starts off with a constant acceleration of 0.80 m s-2. What is the speed of the train when the rear end of the MRT train passes the same signal-post? 96 m/s 14 m/s 12 m/s 48 m/s 3 / 30 2018 S4 EOY P1 Q03 The following table shows the distance of a marble from a fixed point at intervals of two seconds: Which of the following statements about the motion of the marble is correct? The acceleration of the marble is constant. None of the other statements is true. The acceleration of the marble is increasing. The speed of the marble is constant. 4 / 30 2018 S4 EOY P1 Q04 Car A is at rest in front of a traffic light. As the light turns green, Car A accelerates forward. At the exact same instant, Car B overtakes Car A at the traffic light. Both cars continue to accelerate uniformly. After T seconds, Car A catches up with Car B. Which of the following graphs best describes the motion of the two cars after passing the traffic light? 5 / 30 2018 S4 EOY P1 Q05 A ball is thrown vertically upwards at a velocity of 12 m s-1. The ball rises to the highest point. Which of the following statements is false for the ball at this point? The ball has travelled a distance of 14.4 m. The velocity of the ball is 0 m s-1. The time taken to rise to this point is 1.2 s. The magnitude of the acceleration of the ball is 10 m s-2. 6 / 30 2018 S4 EOY P1 Q06 The diagram below shows a uniform rectangular lamina where circles of different sizes have been cut out. Which section does the centre of gravity of the object now lie in? B C D A 7 / 30 2018 S4 EOY P1 Q07 A non-uniform object is resting on an inclined plane as shown in the diagram below. If the object is just about to topple, which position will be its centre of mass? A C B D just about to topple, so must be B. If the centre of mass was at A it would have toppled already. 8 / 30 2018 S4 EOY P1 Q08 Three forces act on an object. Which of the following diagrams correctly shows the forces to be at equilibrium? 9 / 30 2018 S4 EOY P1 Q09 A car has a mass of 1200 kg. What is the work done by its engine in accelerating the car from rest at 2.0 m s-2 for 5.0 s? 2.4 kJ 6.0 kJ 120 kJ 60 kJ 10 / 30 2018 S4 EOY P1 Q10 A cube of dimensions 2.0 cm by 3.0 cm by 4.0 cm is placed on the ground as shown. Given that the density of the block is 1.8 g cm3, what is the pressure under the block? 54 Pa 5.4 Pa 0.54 Pa 540 Pa 11 / 30 (not tested - no longer in syllabus) 2018 S4 EOY P1 Q11 A gas occupies a volume of 25.0 cm3 at a pressure of 120 kPa in a closed container with an attached piston. The piston is pushed in slowly to compress the gas to a volume of 5.0 cm3 while maintaining a constant temperature. What is the new gas pressure? 480 kPa 720 kPa 600 kPa 24 kPa 12 / 30 2018 S4 EOY P1 Q12 In the following figures, a light ray is incident on a plane mirror and then reflected away from it. Which diagram shows the ray with the smallest angle of reflection? A C D B 13 / 30 2018 S4 EOY P1 Q13 A ray of light passes through three media, (1), (2) and (3), as shown below. Which of the above is a correct description of the three media? C A B D 14 / 30 2018 S4 EOY P1 Q14 The echo sounder of a ship emits a pulse of sound which is reflected back to the ship by a shoal of fish directly below the transmitter. The time between the transmission and reception of the pulse is 20 ms. At what depth are the fish from the ship if the speed of sound in sea water is 1400 m/s? 28 m 14 m 140 m 280 m 15 / 30 2018 S4 EOY P1 Q15 The diagram shows a wave on a string with two points P and Q marked. The wave is moving to the right as shown. What will happen next? Q will move up. P will move up. P will move to the right. Q will not move. 16 / 30 2018 S4 EOY P1 Q16 A sound wave has a frequency of 2.5 × 104 Hz. Whether it can be heard or not will depend on the quality of the note. This wave can be heard as it is in the audible region. This wave cannot be heard as it is in the infrasound region. This wave cannot be heard as it is in the ultrasound region. 17 / 30 2018 S4 EOY P1 Q17 Which of the following ways is/are adopted in the heat exchange pipes at the back of a refrigerator? (1) Paint the pipes black. (2) Use a good conductor of heat for the pipes. (3) Paint the parts silver. (1) and (2) only (1) and (3) only (3) only (1) only 18 / 30 2018 S4 EOY P1 Q18 Cups X and Y have identical shape and size and are made of the same material. The graph below shows the cooling curves of cups X and Y containing hot water and left to cool. Which statement is true? Cup X contains more water then cup Y There is a lid over the top of cup X but no lid over the top of cup Y Cup X is placed in cooler surroundings than cup Y Cup X has a dull black surface but cup Y has a smooth shiny surface 19 / 30 2018 S4 EOY P1 Q19 A space vehicle is designed to return to Earth safely after a trip to outer space. It is covered with heat shields so as to protect the interior from getting too hot while entering the Earth's atmosphere. Which of the following thermal properties is/are desirable for the material to be used to make the heat shields? (1) It should be a good conductor of thermal energy. (2) It should have a very high melting point. (3) It should have high specific heat capacity. (3) only (1) only (2) and (3) only (1) and (2) only 20 / 30 2018 S4 EOY P1 Q20 Water of mass 0.87 kg at 90.0 ºC is poured into an insulated metal container of mass 0.50 kg at 20.0 ºC. The final temperature of the water is 86.2 ºC. The specific heat capacity of water is 4200 J kg–1 K–1. Assume there is no energy loss to the surroundings. What is the specific heat capacity of the metal used to make the container? 480 J kg–1 K–1 360 J kg–1 K–1 380 J kg–1 K–1 420 J kg–1 K–1 21 / 30 2018 S4 EOY P1 Q21 Two identical light and neutral conducting balls P and Q hang from insulating threads as shown below. A negatively-charged conducting sphere is brought near to touch ball P and then removed. Assume that balls P and Q do not touch each other throughout the process. Which diagram shows the most likely final position of these two balls? 22 / 30 2018 S4 EOY P1 Q22 Two bulbs X and Y are connected to a 6.0 V battery as shown. If the potential difference (p.d.) across bulb X is 2.0 V, which of the following statements is NOT correct? When 1.0 C of charge pass through bulb Y, 2.0 J of energy is transferred to this bulb. When 2.0 C of charge pass through bulb X, 4.0 J of energy is transferred to this bulb. The charge passing through bulb X in 1.0 s is equal to the charge passing through bulb Y in 1.0 s. The work done to move 1.0 C of charge across bulb Y is 4.0 J. 23 / 30 2018 S4 EOY P1 Q23 A 2.0 V cell is connected to an ammeter and three identical resistors. In which of the following arrangements does the ammeter give the largest reading? 24 / 30 2018 S4 EOY P1 Q24 A variable resistor and a light bulb are connected in parallel to an accumulator and the lamp shines brightly. When the resistance of the variable resistor is halved, the bulb will shine as brightly as before. shine more brightly. shine much less brightly. probably burn out. 25 / 30 2018 S4 EOY P1 Q25 The bulb in the circuit below is lit with normal brightness when both switches S1 and S2 are opened. What happens to the brightness of the bulb if only S1 or S2 is closed? only S1 is closed: decreases only S2 is closed: decreases only S1 is closed: decreases only S2 is closed: increases only S1 is closed: increases only S2 is closed: decreases only S1 is closed: increases only S2 is closed: increases 26 / 30 2018 S4 EOY P1 Q26 If a 10 A fuse can properly protect a rice cooker operating at 220 V, which of the following can be the maximum power of the rice cooker? 1000 W 500 W 4000 W 2000 W 27 / 30 2018 S4 EOY P1 Q27 The diagram below shows the cross-section of 4 wires. The wires are long and run parallel to each other. Two of the wires have current going into the page and two have current coming out of the page. The magnitude of the currents in all four wires is the same. What is the direction of the magnetic field at P? (Ignore the Earth's magnetic field.) Downwards Upwards To the left To the right 28 / 30 2018 S4 EOY P1 Q28 Two current-carrying wires are parallel to each other. Which of the following correctly shows the direction of the forces acting on the two wires? 29 / 30 2018 S4 EOY P1 Q29 The following is a voltage-time graph of a simple a.c. generator. Which graph is correct if the coil of the generator now has twice the number of loops as the original one? 30 / 30 2018 S4 EOY P1 Q30 The diagram below shows two different power transmission systems, X and Y, which transmit power to a heater with rating ‚"220 V, 484 W". The total resistance of the transmission cables in both systems are 10 Ω. In system Y, assume there is no power loss in the transformers and in the circuits P and Q. What is the ratio of the power loss in transmitting power in system X to that in system Y? 15:1 20:1 10:1 25:1 Your score is