TMJC 2024 H2 Physics P1 QP AS

CANDIDATE NAME ( ) CIVICS GROUP _________________________________________________________________________ H2 PHYSICS 9749/01 Paper 1 Multiple Choice 20 September 2024 1 hour Additional Materials: Multiple Choice Answer Sheet _________________________________________________________________________ READ THESE INSTRUCTIONS FIRST You do not need to submit this Booklet at the end of the examination. Write in soft pencil. Do not use paper clips, glue or correction fluid. Write your name, class and index number on the Multiple Choice 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, D. Choose the one you consider correct and record your choice in soft pencil on the Multiple Choice Answer Sheet. Read the instructions on the Multiple Choice 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 in this booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 15 printed pages and 1 blank page. TAMPINES MERIDIAN JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION

2 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics Data speed of light in free space c = permeability of free space o = permittivity of free space ε0 = = elementary charge e = the Planck constant h = unified atomic mass constant u = rest mass of electron me = rest mass of proton mp = molar gas constant R = 8.31 J K−1 mol−1 the Avogadro constant NA = the Boltzmann constant k = gravitational constant G = acceleration of free fall g = 8 13.00 10 m s 7 14 10 H m   12 18.85 10 F m  9 11/ 36 10 F m   191.60 10 C 346.63 10 J s 271.66 10 kg 319.11 10 kg 271.67 10 kg 23 16.02 10 mol 23 11.38 10 J K  11 2 26.67 10 N m kg  29.81 m s

3 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics Formulae uniformly accelerated motion s = ut + at2 v2 = u2 + 2as work done on / by a gas W = pV hydrostatic pressure p = gh 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 = kT 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 = Anvq resistors in series R = … 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 = decay constant = 1 2 GM r 21 3 NmcV 3 2 2 2 ox x 1 2R R  1 / R 1 21/ 1/R R  04 Q r 0 2 d   I 0 2 N r  I 0n I 0expx t   12 ln2 t

4 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 1 What is a reasonable estimate for the volume of a pen? A 0.10 cm3 B 1.0 cm3 C 10 cm3 D 100 cm3 2 The diagram shows the variation with time t of the acceleration a of a body travelling in a straight line. What is the change in velocity between t = 0 and t = 10 s? A zero B −0.60 m s−1 C −6.0 m s−1 D −15.6 m s−1 a / m s−2 2.4 t / s −3.6 10 0 4.0

5 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 3 A large block of concrete is placed on the ground at the equator where it is rotating with the Earth. The forces acting on the Earth and on the concrete are shown. Which pairs of forces demonstrate Newton’s 2nd Law & Newton’s 3rd Law? Newton’s 2 nd Law Newton’s 3 rd Law A F3 and F4 F 2 and F4 B F3 and F4 F 1 and F2 C F1 and F3 F 2 and F4 D F1 and F3 F 1 and F2 equator axis of rotation forces acting on the Earth forces acting on the concrete F1 F2 F4 F3 position of concrete

6 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 4 An octagonal shaped nut, of width d, is subjected to eight forces F as shown below. All forces are equal in magnitude. What is the net torque caused by all the forces? A Fd B 2Fd C 3Fd D 4Fd 5 An oil-drum floats in equilibrium in seawater as shown. The drum has a cross-sectional area of 0.19 m2. The length of the drum submerged under water is 0.80 m. The density of seawater is 1.1 × 103 kg m−3. What is the mass of the drum and its content? A 167 kg B 251 kg C 1640 kg D 1770 kg F F F F F F F F d drum 0.80 m seawater cross sectional area 0.19 m2

7 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 6 The diagram shows a wheel of circumference 0.30 m which is driven by an electric motor. A rope is fastened at one end of the spring balance. The rope passes over the wheel and supports a freely hanging load of 100 N. When the wheel makes 50 revolutions per second, the balance reading is constant at 20 N. The efficiency of the motor is 20%. What is the electrical power supplied to the motor? A 240 W B 360 W C 6000 W D 9000 W 7 A body moves in a uniform circular motion from A to B as shown in the diagram. The radius of the circle is 0.40 m and the speed of the body is 6.0 m s−1. What is its angular velocity and angular displacement? angular velocity / rad s−1 angular displacement / rad A 2.4 0.63 B 2.4 1.6 C 15 0.63 D 15 1.6 6.0 m s−1 A 0.40 m B spring balance load wheel

8 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 8 On the surface of the Earth, the gravitational force on an object is W. What is the gravitational force on the object when it is at a height of 2R above the surface of the Earth, where R is the radius of the Earth? A 2 W B 3 W C 4 W D 9 W 9 A communications satellite which takes 24 hours to orbit the Earth is replaced by a new satellite which has twice the mass of the old one. The new satellite also has an orbit time of 24 hours. What is the value of radius of orbit of new satellite radius of orbit of old satellite? A 1 2 B 1 1 C 2 1 D 2 1 10 The diagram shows the variation with displacement x of the velocity v of a body undergoing simple harmonic motion. What is the time for the body to take to reduce its speed from maximum to zero? A 0.20 s B 0.31 s C 1.3 s D 4.0 s v / m s−1 x / m 20 −20 4.0 −4.0

9 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 11 A sound wave travelling towards the right through air causes the air molecules to be displaced from their original positions. The graph below shows the variation with distance of the displacement of air molecules at a particular instant of time. Taking the displacement towards the right as positive, at which point is the pressure minimum? 12 S1 and S2 are two wave generators producing waves of intensity 0.36I and 0.25I respectively at P. A resultant intensity minima occurs at P as shown in the diagram below. What is the resultant intensity at point P in terms of I? A zero B 0.010I C 0.11I D 0.31I 13 A standing wave is set up on a stretched string PQ as shown in the diagram below. At which point will the oscillation have π radian phase difference with that at X? distance displacement A B C D X A B C P Q D S1 S2 P

10 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 14 An ideal gas is placed in a sealed rigid container and heated uniformly. Which of the following remains constant? A average speed of the gas molecules B average distance between the gas molecules C average force acting