ASRJC 2022 Prelim P1

1 9749/01/ASRJC/2022PRELIM [Turn Over Name: _____________________________ ( ) Class: 22 / ______ 2022 JC2 Preliminary Examination PHYSICS Higher 2 9749/01 Paper 1 Multiple Choice Tuesday 20 September 2022 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 and class on the Multiple Choice Answer Sheet. Shade and write your NRIC/FIN. 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 Multiple Choice Answer Sheet. Read the instructions on the Multiple Choice 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 question paper. The use of an approved scientific calculator is expected, where appropriate. This document consists of 19 printed pages and 1 blank page. ANDERSON SERANGOON JUNIOR COLLEGE

2 9749/01/ASRJC/2022PRELIM Data speed of light in free space c = 3.00 x 108 m s-1 permeability of free space 0 = 4 x 10-7 H m-1 permittivity of free space 0 = 8.85 x 10-12 F m-1 (1/(36)) x 10-9 F m-1 elementary charge e = 1.60 x 10-19 C the Planck constant h = 6.63 x 10-34 J s unified atomic mass constant u = 1.66 x 10-27 kg rest mass of electron me = 9.11 x 10-31 kg rest mass of proton mp = 1.67 x 10-27 kg molar gas constant R = 8.31 J K-1 mol-1 the Avogadro constant NA = 6.02 x 1023 mol-1 the Boltzmann constant k = 1.38 x 10-23 J K-1 gravitational constant G = 6.67 x 10-11 N m2 kg-2 acceleration of free fall g = 9.81 m s-2

3 9749/01/ASRJC/2022PRELIM [Turn Over Formulae uniformly accelerated motion =s 2 2 1 atut + =2v asu 22 + work done on/by a gas =W Vp hydrostatic pressure =p gh gravitational potential = r Gm− temperature T/K = T/C + 273.15 pressure of an ideal gas p =  2 3 1 cV Nm mean translational kinetic energy of an ideal gas molecule =E kT2 3 displacement of particle in s.h.m. x = x0 sin  t velocity of particle in s.h.m. v = v0 cos  t = 22 xxo − electric current I = Anvq resistors in series R = R1 + R2 + … resistors in parallel 1/R = 1/R1 + 1/R2 + … electric potential V = r Q o4 alternating current/voltage x = x0 sin  t magnetic flux density due to a long straight wire B = d o   2 I magnetic flux density due to a flat circular coil B = r No 2 I magnetic flux density due to a long solenoid B = Ino radioactive decay x = x0 exp(–t) decay constant  = 2 1 2ln t

4 9749/01/ASRJC/2022PRELIM 1 The SI unit of specific heat capacity is J kg–1 K–1. What is the unit of specific heat capacity expressed in SI base units? A m s–2 K–1 B m2 s–2 K–1 C kg m s–1 K–1 D kg m2 s–1 K–1 2 Quantity X has a fractional uncertainty of x. Quantity Y has a fractional uncertainty of y. What is the fractional uncertainty in 2 3X Y ? A 3x + 2y B 3x – 2y C x + 2y D x – 2y 3 A car is travelling at constant velocity. Its brakes are then applied, causing uniform deceleration. Which graph shows the variation with distance s of the velocity v of the car? A B C D 4 An object falls freely from rest in a vacuum. The graph shows the variation with time t of the velocity v of the object. Which graph, using the same scales, represents the object falling in air?

5 9749/01/ASRJC/2022PRELIM [Turn Over 5 A ball strikes a horizontal surface with momentum p at an angle θ to the surface, as shown. The ball rebounds with the same magnitude of momentum at an angle θ to the surface. The ball is in contact with the surface for time t. What is the magnitude of the average resultant force acting on the ball during the collision? 6 A student pulls a book from a shelf by its top corner, holding it between his forefinger and thumb. The book is uniform and has weight W and dimensions x and y as shown. What moment must the student provide at the corner of the book to stop it from rotating just before it leaves the shelf? A 2 Wy anticlockwise B 2 Wx anticlockwise C () 2 −W y x clockwise D Wx clockwise y x

6 9749/01/ASRJC/2022PRELIM 7 A train of mass 250 000 kg is accelerating at 0.90 m s−2. At one instant, the speed of the train is 5.0 m s−1 and the resistive force to its motion is 15 kN. At this instant, what is the rate of increase of kinetic energy of the train? A 75 kW B 1.1 MW C 1.2 MW D 3.1 MW 8 Titan, the largest moon of Saturn, orbits in a circle around Saturn with a radius of 1.22 × 106 km. It has an orbital period of 15.9 days. What is the centripetal acceleration of Titan? A 4.06 × 10−3 m s−2 B 2.55 × 10−2 m s−2 C 9.19 × 10−2 m s−2 D 1.55 × 103 m s−2 9 A record on a turntable rotates at a constant number of revolutions per second. Which graph best represents the relationship between the linear speed v of a point on the record and its distance r from the centre of the rotation? A B C D 0 0 v r 0 0 v r 0 0 v r 0 0 v r

7 9749/01/ASRJC/2022PRELIM [Turn Over A 6.4 × 103 m s−1 B 7.8 × 103 m s−1 C 1.6 × 104 m s−1 D 1.9 × 104 m s−1 12 An ideal gas is contained in two spherical containers X and Y of volume 2V and V respectively, connected by a hollow tube of negligible volume. The containers X and Y are maintained at temperatures 2T and T respectively. The setup is shown in the diagram below. What is the ratio number of moles of gas in container X number of moles of gas in container Y ? A 0.25 B 1 C 2 D 4 13 Water has a higher specific heat capacity than iron. The same amount of heat is given to equal masses of water and iron that are initially at the same temperature. Which of the following statements is true? A The temperature of the iron rises faster than the water but both reach the same final temperature. B The temperature of the water rises faster than the iron but both reach the same final temperature. C The iron is now warmer than the water. D The water is now warmer than the iron. 10 The escape speed of a nitrogen molecule at the Earth’s surface is 1.1 × 104 m s−1. What is the escape speed at a height of 2 RE above the Earth’s surface, where RE is the radius of the Earth? 11 Which of the following statement about a geostationary satellite is true? A It can remain vertically above any chosen fixed point on the Earth. B Its linear speed is equal to the speed of a point on the Earth’s equator. C It has the same angular velocity as the Earth’s rotation on its own axis. D It is always travelling from east to west. X Y 2V 2T V T

8 9749/01/ASRJC/2022PRELIM 14 A gas undergoes one cycle of pressure and volume changes X→Y→Z→X as shown. What is the net work done on the gas? A − 180 J B − 60 J C 60 J D 120 J A B C D 15