RVHS H2 Physics P1 QP

River Valley High School Pg 1 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 RIVER VALLEY HIGH SCHOOL JC2 PRELIMINARY EXAMINATIONS H2 PHYSICS 9749 PAPER 1 26 SEP 2025 1 HOUR CANDIDATE NAME CENTRE NUMBER S INDEX NUMBER CLASS 2 4 J INSTRUCTIONS TO CANDIDATES DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO. Read these notes carefully. Write your name, class and index number above. There are thirty questions in this section. Answer all questions. For each question, there are four possible answers, A, B, C and D. Choose the one you consider correct and shade your choice in soft pencil on the separate Optical Answer Sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done on the Question Paper. The use of an approved scientific calculator is expected where appropriate. Hand in the Optical Answer Sheet. _________________________________________________________________________ This document consists of 17 printed pages and 1 blank page.

River Valley High School Pg 2 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 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

River Valley High School Pg 3 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 Formulae uniformly accelerated motion 21 2s ut at=+ 22 2v u as=+ work done on/by a gas W p V= hydrostatic pressure p gh= gravitational potential rGm−= temperature T / K = T / C + 273.15 pressure of an ideal gas = 2 3 1 cV Nmp mean translational kinetic energy of an ideal gas molecule 3 2E kT= displacement of particle in s.h.m. txx sin0= velocity of particle in s.h.m. tvv = cos0 22 0 xx −= electric current Anvq=Ι resistors in series 12R R R= + + resistors in parallel 121/ 1/ 1/R R R= + + electric potential r QV 04= alternating current/voltage txx sin0= magnetic flux density due to a long straight wire dB   2 0I= magnetic flux density due to a flat circular coil r NB 2 0 I= magnetic flux density due to a long solenoid InB 0= radioactive decay )exp(0 txx −= decay constant 2 1 2ln t=

River Valley High School Pg 4 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 For each question, there are four possible answers, A, B, C and D. Choose the one you consider correct and shade your choice in soft pencil on the separate Answer Sheet. 1 Which of the following quantities has a unit that can be expressed in terms of just two different SI base units? A area B charge C current D force 2 Which of the following experimental techniques reduces the systematic error of the quantity being investigated? A measuring several distances between adjacent nodes on a standing wave to find the mean distance B measuring the diameter of a wire repeatedly and calculating the average C adjusting an analogue ammeter to remove its zero error before measuring a current D timing a large number of oscillations to find a period 3 The graph shows how velocity v varies with time t for a bungee jumper. At which point is the bungee jumper momentarily at rest and at which point does she have zero acceleration? jumper at rest jumper with zero acceleration A P Q B Q R C R Q D R R v t

River Valley High School Pg 5 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 4 A stationary uranium nucleus disintegrates, emitting an alpha -particle of mass 6.65 ×10−27 kg and another nucleus X of mass 3.89 ×10−25 kg. Which of the following gives the ratio speed of alpha-particle speed of nucleus X ? A 0.017 B 0.98 C 1.0 D 58 5 A force F acts on a system of masses M1, M2 and M3 on a frictionless floor as shown. The structure of the system of the masses remains unchanged as it accelerates. Which of the following gives the magnitude of the frictional force on M3? A F B F ( M3 M2 ) C F ( M3 M1+M2 ) D F ( M3 M1+M2+M3 ) X M1 M2 M3 F diagram not drawn to scale

River Valley High School Pg 6 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 6 The variation with force of the extension of a spring is shown in the figure below. The work done in stretching the spring from x1 to x2 is given by the area A P + Q B S C R + S D Q 7 A mass m moves on a rough plane inclined at an angle θ to the horizontal and, when moving, experiences a constant frictional force F. Mass M is attached to it by means of a light inelastic cord running over a smooth pulley. Mass M is allowed to fall a vertical distance x, causing m to move up the plane as shown. How much heat is generated by friction in this process? A Fx B mgxsinθ C mgxsinθ − Fx D mgxsinθ + Fx x2 x1 R P S Q x / m F / N 0

River Valley High School Pg 7 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 8 A constant force is applied to a body which is initially stationary but free to move in the direction of the force. Assuming that the effects of friction are negligible, which of the following graphs best represents the variation of p, the power supplied, with time t? A B C D 9 An aircraft is travelling at constant speed in a horizontal circle, centre Q. Each diagram shows a tail -view of the aircraft, the dotted line representing the orientation of the wings and the circle representing the centre of gravity of the aircraft. Which diagram correctly shows the direction of forces acting on the aircraft? A B C D 0 0 0 0

River Valley High School Pg 8 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 10 In the diagram, the volume of bulb X is twice that of bulb Y. The system is filled with an ideal gas and a steady state is established with the bulbs X and Y at temperature 200 K and 400 K respectively. If the mass of gas in X is m, what is the mass of gas in Y? A m 4 B m 2 C m D 4m 11 One mole of ideal gas is contained within a cylinder by a frictionless piston and is initially at temperature T. The pressure of the gas is kept constant while it is heated and its volume doubles. If R is the molar gas constant, what is the work done by the gas in increasing its volume? A 1 2RT B RT C 3 2RT D 2RT 12 Which of the following statements about internal energy is correct? A The internal energy of a system depends only on its temperature. B When the internal energy of a system is increased, its temperature always rises. C The internal energy of a system can be increased without transfer of energy by heating. D When two systems have the same internal energy, they must be at the same temperature. X 200 K Y 400 K

River Valley High School Pg 9 of 18 H2 Physics 9749 JC 2 Preliminary Examinations 2025 13 The acceleration of free fall on the surface of the surface of the Earth is about 6 times its value on the surface of the Moon. The mean density of the Earth is about 5 3 times the mean density of the Moon. Using the data, what is the bes