YIJC 2024 JC2 PRELIM H2 Phy P1 QP

©YIJC 9749/01/YIJC/PRELIM/2024 [Turn over YISHUN INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAM Higher 2 CANDIDATE NAME CG INDEX NO PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 9749/01 13 September 2024 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid/tape. Write your name, class and index number on the Answer Sheet in the spaces provided unless this has been done for you. 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 ©YIJC 9749/01/YIJC/PRELIM/2024 Data speed of light in free space, c = 3.00  108 m s–1 permeability of free space, o = 4  10–7 H m–1 permittivity of free space, o = 8.85  10–12 F m–1 (1/(36))  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 ©YIJC 9749/01/YIJC/PRELIM/2024 [Turn over Formulae uniformly accelerated motion, s = ut + at2 v2 = u2 + 2as work done on/by a gas, W = p V hydrostatic pressure, p =  g h gravitational potential,  = temperature, T/K = T/°C + 273.15 pressure of an ideal gas, p = mean translational kinetic energy of an ideal gas molecule, E = displacement of particle in s.h.m. x = xo sin  t velocity of particle in s.h.m., v = vo cos  t =   electric current, I = A n v q resistors in series, R = R1 + R2+………. resistors in parallel, = electric potential, V = alternating current/voltage, x = xo sin  t magnetic flux density due to a long straight wire, B = magnetic flux density due to a flat circular coil, B = magnetic flux density due to a long solenoid, B = radioactive decay, x = xo exp(–t) decay constant,  = 2 1  r Gm− 2CV Nm 3 1 kT2 3 )( 22 xxo − R 1 ........11 21 ++ RR r Q o4 dπ2 oIμ r2 No Iμ Ion 2 1t 2 ln

4 ©YIJC 9749/01/YIJC/PRELIM/2024 Answer all questions. 1 A hollow cylinder, which is open at both ends, has a radius of (3.0 ± 0.1) cm and a length of (15.0 ± 0.1) cm. What is the value, with its absolute uncertainty, of the surface area of the cylinder? A (280 ± 10) cm2 B (282.7 ± 0.2) cm2 C (420 ± 30) cm2 D (424.1 ± 0.3) cm2 2 A metal ball is dropped from rest over a bed of sand. It hits the sand bed one second later and makes an impression of maximum depth of 8.0 mm in the sand. Assuming air resistance is negligible, what is the average deceleration of the ball on hitting the sand? A 6.0 × 102 m s–2 B 1.2 × 103 m s–2 C 6.0 × 103 m s–2 D 1.2 × 104 m s–2 3 A car of mass 1500 kg has a driving force of 5600 N and it pulls a trailer of mass 500 kg. The resistive forces acting on the car and trailer are 1200 N and 400 N respectively. What is the tension in the coupling between the car and trailer for this acceleration? A 0 N B 1400 N C 1800 N D 2600 N

5 ©YIJC 9749/01/YIJC/PRELIM/2024 [Turn over 4 A horizontal beam has its centre of gravity at X. It is supported by a vertical wire attached to the beam at point R as indicated on the diagram. The tension in the wire is equal to the weight of the beam. The ends of the beam fit into the sockets P and Q in two rigid vertical walls which keep the beam in equilibrium. What are the directions of the forces acting on the beam at sockets P and Q? socket P socket Q A upwards upwards B upwards downwards C downwards upwards D downwards downwards 5 A rubber strip is stretched by a force. The graph of the applied force against its length is shown. What is the work done in stretching the strip to the first point where it no longer obeys Hooke’s law? A 0.014 J B 0.70 J C 1.4 J D 700 J weight X R tension P Q

6 ©YIJC 9749/01/YIJC/PRELIM/2024 6 The figure shows a barrel of weight 1.0 × 103 N on a frictionless slope inclined at 30o to the horizontal. A force is applied to the barrel to move it up the slope at constant speed. The force is parallel to the slope. What is the work done by the force in moving the barrel a distance of 5.0 m up the slope? A 2.5 × 103 J B 4.3 × 103 J C 5.0 × 103 J D 1.0 × 104 J 7 A man lifts a weight of 480 N with a constant speed through a distance of 3.5 m using a rope and some pulleys. The man pulls on the rope with a force of 200 N and a length of 10.5 m passes through his hands. What is the efficiency in percentage of the pulley system? A 20% B 40% C 60% D 80% 8 The figure below shows a siren disk that has 16 holes near the edge which are equally spaced apart. When the disk is spun in front of a fast-moving jet of air, the holes modulate the air -jet to produce a sound of a particular frequency. The time it takes for successive holes to move past the air jet is the period of the sound wave. What is the angular speed of rotation if the frequency of the sound produced is 2200 Hz? A 430 rad s−1 B 860 rad s−1 C 1730 rad s−1 D 3650 rad s−1

7 ©YIJC 9749/01/YIJC/PRELIM/2024 [Turn over 9 Two satellites, X and Y, have circular orbits around Earth and have the same kinetic energy. Satellite X has a larger mass than Satellite Y. Which of the following statements is false? A Satellite X has a smaller total energy. B Satellite X has a larger orbital radius. C Satellite X has a larger period. D Satellite X has a smaller angular velocity. 10 An external agent does 100 J of work in moving a 2.0 kg mass from point X to point Y in a gravitational field, and –120 J of work in moving the mass from point Y to point Z. Finally, the external agent does 2000 J of work in moving the mass from point Z to infinity. What is the gravitational potential at point X? A –990 J kg–1 B –1010 J kg–1 C –1110 J kg–1 D –1980 J kg–1 11 A 1.2 kW kettle is used to raise the temperature of 0.80 kg of water from 25°C to 100°C. The water then boils off totally. The specific heat capacity and the latent heat of vaporisation is 4.2 kJ kg −1 K−1 and 2300 kJ kg −1 respectively. If it took 30 mins for the whole process, what is the average rate of power loss to the surrounding? A 38 W B 180 W C 1100 W D 2300 W 12 The r.m.s. speed of the atoms of an ideal gas at 330 K is increased by 20%. What is the new temperature of the gas? A 230 K B 275 K C 396 K D 475 K

8 ©YIJC 9749/01/YIJC/PRELIM/2024 13 A periodic force is applied to a lightly-damped object, causing the object to oscillate. The graph shows how the amplitude A of the oscillations varies with the frequency f of the periodic force. Which of the following statements best describes how the shape of the curve would differ if the dam