2025 NYJC H2 Phy 9749 P1

NYJC 2025 9749/01/J2Prelim/25 [Turn over NANYANG JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 2 CANDIDATE NAME CLASS TUTOR’S NAME CENTRE NUMBER S INDEX NUMBER PHYSICS 9749/01 Paper 1 Multiple Choice 24 September 2025 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class, Centre number and index number in the spaces at the top of this page. 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 13 printed pages. H

2 NYJC 2025 9749/01/J2Prelim/25 Data speed of light in free space c = 3.00 × 108 m s−1 permeability of free space  = 4 × 10−7 H m−1 permittivity of free space  = 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 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 /Gm r =− temperature / K / C 273.15TT =  + pressure of an ideal gas 21 3 Nmpc V=   mean translational kinetic energy of an ideal molecule 3 2E kT= displacement of particle in s.h.m. 0 sinx x t = velocity of particle in s.h.m. 0 cosv v t = 22 0xx=  − electric current =I Anvq resistors in series 12 . . .R R R= + + resistors in parallel 121/ 1/ 1/ . . .R R R= + + electric potential 04 QV r= alternating current/voltage 0 sinx x t = magnetic flux density due to a long straight wire  = 0 2 IB d magnetic flux density due to a flat circular coil = 0 2 NIB r magnetic flux density due to a long solenoid = 0B nI radioactive decay 0 exp( )x x t =− decay constant 1 2 ln2 t =

3 NYJC 2025 9749/01/J2Prelim/25 [Turn over 1 A single sheet of aluminium foil is folded twice to produce a stack of four sheets. The total thickness of the stack of sheets is measured to be (0.80  0.02) mm. This measurement is made using a digital calliper with zero error of (−0.20  0.02) mm. What is the percentage uncertainty in the calculated thickness of a single sheet? A 1.0% B 2.0% C 4.0% D 6.7% 2 A voltmeter connected across a resistor in a circuit gives readings which have high precision but low accuracy. Which of the following best describes the likely error in readings taken with this voltmeter? random error systematic error A high high B high low C low high D low low 3 A stone falls vertically and strikes soft ground with speed u. The stone experiences constant deceleration until it comes to rest. Which graph shows the variation of speed v with distance s below the ground surface? A B C D 4 A particle X with kinetic energy Ek collides with a stationary particle Y. Both particles have the same mass. After colliding, X and Y travel together as a single particle. How much kinetic energy is lost in the collision? A zero B 4 kE C 2 kE D 3 4 kE s s s s v u v u v u v u

4 NYJC 2025 9749/01/J2Prelim/25 5 A sphere of mass 3.0 kg travelling due North at 2.0 m s−1 collides with another sphere of mass 4.0 kg travelling due East at 2.0 m s−1. The magnitude of their resultant momentum after the collision will be A 2.0 kg ms–1. B 10 kg m s–1. C 14 kg m s–1. D dependent on whether the the collision is elastic or inelastic. 6 A block and a sphere of equal mass m are placed on an inclined plane. If the maximum frictional force that can exist between the block and the plane is equal to the weight of the block, and there is no frictional force between the sphere and the plane, what is the maximum angle θ at which the plane can be inclined before the block starts to slip? A 30° B 45° C 60° D 73° 7 Blocks A and B, of masses 4.0 kg and 6.0 kg respectively, are connected by a light cord passing over a light, frictionless pulley. Block A is held at rest on a rough slope inclined at 30° to the horizontal as shown. When A and B are released, block A experiences a constant frictional force of 3.0 N. What is the total kinetic energy of A and B when B has travelled 2.0 m downwards? A 39 J B 72 J C 78 J D 118 J θ B 30 2.0 m

5 NYJC 2025 9749/01/J2Prelim/25 [Turn over 8 A wire is stretched elastically by a force of 200 N, causing an extension of 2.00 mm. The force is gradually increased to 250 N, and the wire remains within its elastic limit. What is the work done in stretching the wire from 200 N to 250 N? A 0.113 J B 0.225 J C 113 J D 225 J 9 A small mass is attached to a light string and rotates in a vertical circle of radius r. Taking g to be acceleration of free fall, what is the centripetal acceleration of the mass when it is at the lowest point of motion if the speed of the mass at the highest point just allow the mass to complete the circular motion? A g B 2g C 4g D 5g 10 Two satellites P and Q orbit the Earth due to the gravitational field of the Earth. P and Q are at distances R and 3R from the Earth’s surface respectively, where R is the radius of the earth. The speed of P is v. What is the speed of Q? A 1 3 v B 1 2 v C 2 v D 3 v 11 Mars has a diameter that is approximately 0.5 times the diameter of the Earth, and the mass of Mars is 0.1 times the mass of the Earth. Given that the gravitational potential at the Earth’s surface is ‒63 MJ kg‒1. What is an approximate value for the gravitational potential at the surface of Mars? A ‒13 MJ kg‒1 B ‒25 MJ kg‒1 C ‒95 MJ kg‒1 D ‒320 MJ kg‒1 r mass

6 NYJC 2025 9749/01/J2Prelim/25 12 Container X contains neon and container Y contains argon. The two containers are identical, and the two gases are at the same temperature. The pressure in X is twice that in Y. What is the ratio of the mean kinetic energy of a neon molecule to the mean kinetic energy of an argon molecule? [The relative atomic masses of neon and argon are 20 and 40 respectively.] A 0.5 B 1 C 2 D 4 13 The density of helium a t 150 kPa is 0.178 kg m -3. What is the root -mean-square speed of its particles? A 130 m s-1 B 232 m s-1 C 1300 m s-1 D 1600 m s-1 14 An ideal gas goes through the thermodynamic cycle EFGHE as shown. Which of the following statements is correct? A After completing one cycle, there is net heat lost by the gas. B During process FG, there is no change in the internal energy of the gas. C During process HE, the gas loses heat. D The work done by the gas during process EF is equal in magnitude to the work done on the gas during process GH.

7 NYJC 2025 9749/01/J2Prelim/25 [Turn over 15 This diagram shows the displacement-distance graph of a transverse wave at time, t = 0. Taking upwards as positive, point Q is a point on the wave and is trav