EJC 2019 J1H2 Promo P1 (Printed)

©EJC 2019 9749/01/J1H2PROMO/2019 [Turn over EUNOIA JUNIOR COLLEGE JC1 Promotional Examination 2019 General Certificate of Education Advanced Level Higher 2 PHYSICS Paper 1 Multiple Choice 9749/01 04 October 2019 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use paper clips, glue or correction fluid. Write your name, civics group and registration number on the Answer Sheet in the spaces provided. There are thirty 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 16 printed pages.

2 ©EJC 2019 9749/01/J1H2PROMO/2019 Data speed of light in free space, c = 3.00 × 108 m s–1 permeability of free space, μo = 4π × 10–7 H m–1 permittivity of free space, εo = 8.85 × 10–12 F m–1 (1/(36 π)) × 10–9 F m–1 elementary charge, e = 1.60 × 10–19 C the Planck constant, h = 6.63 × 10–34 J s unified atomic mass constant, u = 1.66 × 10–27 kg rest mass of electron, me = 9.11 × 10–31 kg rest mass of proton, mp = 1.67 × 10–27 kg molar gas constant, R = 8.31 J K–1 mol–1 the Avogadro constant, NA = 6.02 × 1023 mol–1 the Boltzmann constant, k = 1.38 × 10–23 J K–1 gravitational constant, G = 6.67 × 10–11 N m2 kg–2 acceleration of free fall, g = 9.81 m s–2

3 ©EJC 2019 9749/01/J1H2PROMO/2019 [Turn over Formulae uniformly accelerated motion, s = ut + ½at2 v2 = u2 + 2as work done on/by a gas, W = pΔV hydrostatic pressure, p = ρgh gravitational potential, φ = Gm r− temperature, T/K = T / oC + 273.15 pressure of an ideal gas, p = 21 3 Nm cV mean translational kinetic energy of an ideal gas molecule E = 3 2 kT displacement of particle in s.h.m. x = xo sin ωt velocity of particle in s.h.m. v = vo cos ωt = ( )22 xxo −± ω electric current, I = Anvq resistors in series, R = R1 + R2 + … resistors in parallel, 1/R = 1/R1 + 1/R2 + … electric potential, V = 4 o Q rπε alternating current/voltage, x = xo sin ωt magnetic flux density due to a long straight wire B = 2 o d µ π I magnetic flux density due to a flat circular coil B = 2 oN r µ I magnetic flux density due to a long solenoid B = onµ I radioactive decay, x = xo exp (–λt) decay constant λ = 1 2 ln2 t

4 ©EJC 2019 9749/01/J1H2PROMO/2019 1 The radius of the Earth is approximately 6.4 × 10 6 m, and the radius of the Moon is approximately 1.7 × 10 6 m. A student wishes to build a scale model of the Solar system in the classroom, using a football of radius 0.12 m to represent the Earth. What object would best represent the Moon? A basketball B tennis ball C golf ball D cherry 2 A digital meter, which has an accuracy of ± 1%, is used to measure the current in an electrical circuit. The reading on the meter varies between 3.04 A and 3.08 A. What is the value of the current, with its uncertainty? A (3.06 ± 0.02) A B (3.06 ± 0.04) A C (3.06 ± 0.05) A D (3.06 ± 0.07) A 3 The figure shows the speed v versus vertical height y of a ball tossed directly upward. The speed at height yA is vA. The speed at height yB is ¼ vA. The difference between yA and yB is 3.06 m. What is the speed vA? A 2.0 m s-1 B 4.0 m s-1 C 6.0 m s-1 D 8.0 m s-1 ¼ vA 3.06 m vA

5 ©EJC 2019 9749/01/J1H2PROMO/2019 [Turn over 4 A cart is released from rest at point X of the track with side view as shown. The cart makes dots at a constant time interval on a strip of paper laid along the track as the cart moves from point X to Y. The tape is then removed from the cart and laid flat. In each picture below, the tape is oriented so that the first dot that was made on the left. Vertical grid lines have also been added to help gauge the distance between the dots. Neglecting friction, which of the pictures below would most possibly represent the pattern of dots that is made on the tape? X Y A B C D

6 ©EJC 2019 9749/01/J1H2PROMO/2019 5 An object is projected at an acute angle θ above the horizontal. Which of the following graphs correctly shows the variation of the horizontal displacement with time, and the variation of the kinetic energy with vertical displacement of the object? horizontal displacement with time kinetic energy with vertical displacement A Graph 1 Graph 2 B Graph 1 Graph 4 C Graph 3 Graph 2 D Graph 3 Graph 4 6 Three blocks of masses 2 kg, 3 kg and 4 kg are connected by an inextensible string on a horizontal frictionless table as shown. The blocks are pulled to the right by an applied force F. The acceleration of the blocks are 2 m s-2. What is the tension in the string which connects the 3 kg mass to the 4 kg mass? A 4 N B 6 N C 10 N D 14 N y x Graph 1 0 y x Graph 2 0 y x Graph 3 0 y x Graph 4 0 2 kg 3 kg 4 kg string F

7 ©EJC 2019 9749/01/J1H2PROMO/2019 [Turn over 7 A 200 g bob hangs from the ceiling of a train when the train is moving at a constant velocity. Some time later, the train accelerates forward at 4.91 m s-2. What is the angle of inclination of the bob to the vertical? A 27°, with the bob moved forward B 27°, with the bob moved backward C 63°, with the bob moved forward D 63°, with the bob moved backward 8 A particle of mass m is launched with an initial velocity v from a point P. Neglecting air resistance, what is the magnitude of the change in momentum between leaving P and arriving at Q? A zero B ½mv C mv D 2mv 9 In which example is it not possible for the underlined body to be in equilibrium? A An aeroplane climbs at a steady rate. B An aeroplane tows a glider at a constant altitude. C Two boats tow a ship into harbour. D A speedboat changes direction at constant speed. 10 A cylindrical block of wood has cross -sectional area A and weight W. It is totally immersed in water with its axis vertical. The block experiences pressures ρ T and ρB at its top and bottom surfaces respectively. Which expression is equal to the upthrust on the block? A BTρρ− B ( )BTρ ρA− C ( )BTρ ρ AW−− D ( )BTρ ρ AW−+ 30o P Q v Figure 3

8 ©EJC 2019 9749/01/J1H2PROMO/2019 11 The vertical forces that the ground exerts on a stationary van are shown. The van is 2.50 m long with its wheels at a distance of 0.600 m from the front of the van and 0.400 m from the rear of the van. What is the horizontal distance of the van’s centre of gravity from the front of the van? A 0.540 m B 0.960 m C 1.14 m D 1.36 m 12 A small mass m is launched by a spring and travels along a rough track to a point P. The spring constant is k and the initial compression of the spring was x. As it travels to P, it goes through a dip of depth H. The mass experiences a constant force of friction f for the entire distance of d. What is the kinetic energy of the mass at point P? A 21 2 kx fd mgH−− B 21 2 kx fd− C 21 2 kx fd+ D 21 2 kx fd mgH++ m H P

9 ©EJC 2019 9749/01/J1H2PROMO/2019 [Turn over 13 The engine of a boat supplies a constant power of 110 kW to propel the boat forward. The boat attains a maximum speed of 21.0 m s−1. If the magnitude of the resistive force acting on the boat is proportional to the square of the boat’s speed, what is the resultant force acting on the boat when it is moving at the instant when its speed is 15.0 m s−1? A 2.7 kN B 3.6 kN C 4.7 kN D 7.3 kN 14 A turntable has radius R. It is driven by a rubber drive wheel of radiu