RVHS H2 Physics P1 QP

River Valley High School Pg 1 of 20 H2 Physics 9749 JC 2 Preliminary Examinations 2024 RIVER VALLEY HIGH SCHOOL JC2 PRELIMINARY EXAMINATIONS H2 PHYSICS 9749 / 01 PAPER 1 19 SEPTEMBER 2024 1 HOUR CANDIDATE NAME CENTRE NUMBER S INDEX NUMBER CLASS 2 3 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 20 printed pages.

River Valley High School Pg 2 of 20 H2 Physics 9749 JC 2 Preliminary Examinations 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

River Valley High School Pg 3 of 20 H2 Physics 9749 JC 2 Preliminary Examinations 2024 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 20 H2 Physics 9749 JC 2 Preliminary Examinations 2024 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 An alternative form of the unit of resistance, the ohm (Ω), is V A−1. Which of the following examples shows a similar correct alternative form of unit? Unit Alternative form A Newton (N) kg m s−1 B Hertz (Hz) s−2 C Joule (J) N m−1 D Tesla (T) kg A−1 s−2 2 A drone descends from a height for 20 s. The variation with time t of the vertical speed v of the drone is shown. What is the ratio of distance travelled between 0 to 20 s distance travelled between 5 to 15 s ? A 1.1 B 1.3 C 1.5 D 2.0 v / m s−1 t / s 0 20 10 5 15

River Valley High School Pg 5 of 20 H2 Physics 9749 JC 2 Preliminary Examinations 2024 3 A ball is thrown upwards at an angle to the horizontal with an initial speed. Assuming that air resistance is not negligible, which of the following statement is incorrect? A The path of the ball is asymmetrical about a vertical line passing through the highest point. B Horizontal range of the ball is shorter than the case with negligible air resistance. C The maximum height reached by the ball is smaller than the case with negligible air resistance. D The time taken for the flight up to the highest point is longer than the time taken for the flight down. 4 The graph below shows the variation with time of the force exerted by a baseball pitching machine that throws baseballs of mass 150 g from rest. What is the velocity of a ball immediately after leaving the machine? A 13 m s−1 B 43 m s−1 C 87 m s−1 D 295 m s−1 F / N t / s 62 0.21 0

River Valley High School Pg 6 of 20 H2 Physics 9749 JC 2 Preliminary Examinations 2024 5 A block of mass 12 kg lies on a frictionless horizontal table. A rope connects the 12 kg block to another block of mass 10 kg that hangs freely via a frictionless pulley as shown in the diagram below. The system is then released from rest. What is the tension in the rope? A 4.5 N B 16 N C 54 N D 98 N 6 A train moving at 57.8 km h−1 travels around a circular curve at constant speed. An object hung from a string in the train makes an angle of 3.80° with the vertical. What is the radius of the circular path? A 24.6 m B 34.0 m C 396 m D 5130 m 12 kg 10 kg 3.80° centre of circular path Rear view of train

River Valley High School Pg 7 of 20 H2 Physics 9749 JC 2 Preliminary Examinations 2024 7 Given that the mass of Earth is 5.97 × 10 24 kg, what is the speed of a satellite in a geostationary orbit about Earth? A 1.66 × 103 m s−1 B 3.07 × 103 m s−1 C 2.00 × 107 m s−1 D 4.22 × 107 m s−1 8 A uniform spherical planet of mass 1.30 × 1022 kg has a diameter of 2380 km. A space probe of mass 5500 kg is launched from the surface to a height of 240 km. What is the increase in gravitational potential energy of the space probe? A 1.84 × 108 J B 6.73 × 108 J C 3.34 × 109 J D 4.01 × 109 J 9 In the derivation of the relationship between the pressure, the number density of molecules and the mean square speed of the molecules of an ideal gas, which of the following is NOT an essential assumption? A There are no intermolecular forces of attractions. B The volume of the molecules are small when compared to the volume of the container. C The molecules are in continuous random motion and all collisions are elastic. D The average kinetic energy of a molecule is directly proportional to the temperature of the gas.

River Valley High School Pg 8 of 20 H2 Physics 9749 JC 2 Preliminary Examinations 2024 10 A polystyrene cup contains a mass of 130 g of water at 50 C. A cube of ice of mass 20 g and temperature 0 C is placed in the water. The water is stirred until the temperature is homogenous. Assuming negligible heat loss to the cup and surroundings, what is the final temperature of the water? specific heat capacity of water = 4.2 × 103 J kg–1 K–1 specific latent heat of fusion of ice = 3.3 × 105 J kg–1 A 3 C B 18 C C 33 C D 38 C 11 In microwave ovens, water molecules in food are set into resonance when microwaves of a fixed frequency are incident on them. This causes the molecules to receive energy and hence warms up the food. In order to warm up the food faster, one can A increase the frequency of the incident microwave while keeping its amplitude fixed. B increase the frequency and amplitude of the incident microwave. C increase the amplitude of the incident microwave while keeping its frequency fixed. D keep both frequency and amplitude of the microwave the same as before but increase the frequency of the water molecules.

River Valley High School Pg 9 of 20 H2 P