RVHS H2 Physics P1 QP

River Valley High School Pg 1 of 15 H2 Physics 9749 JC 2 Preliminary Examinations 2022 RIVER VALLEY HIGH SCHOOL JC2 PRELIMINARY EXAMINATIONS H2 PHYSICS 9749 PAPER 1 23 SEP 2022 1 HOUR CANDIDATE NAME CENTRE NUMBER S INDEX NUMBER CLASS 2 1 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 15 printed pages.

River Valley High School Pg 2 of 15 H2 Physics 9749 JC 2 Preliminary Examinations 2022 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 15 H2 Physics 9749 JC 2 Preliminary Examinations 2022 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 15 H2 Physics 9749 JC 2 Preliminary Examinations 2022 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 A period T of a type of pendulum is given by 2T K= I If I has a unit of kg m2, which of the following can be a unit of K? A N m B N m−1 C kg m2 D s−2 2 Two stones, X and Y, of different mass es are dropped from the top of a cliff. Stone Y is dropped a short time after stone X. Air resistance is negligible. Whilst the stones are falling, the distance between them will A decrease if the mass of Y is more than the mass of X. B increase if the mass of X is more than the mass of Y. C decrease regardless if the mass of X is more than or less than the mass of Y. D increase regardless if the mass of X is more than or less than the mass of Y. 3 An engine pulls and accelerates two identical carriages to the right as shown below. If the tension in the towbar between the engine and carriage 1 is T, what is the tension between carriages 1 and 2? Ignore drag and resistive forces. A T B 2 T C 2T D 3 T carriage 2 carriage 1 engine

River Valley High School Pg 5 of 15 H2 Physics 9749 JC 2 Preliminary Examinations 2022 4 A man stands on a weighing scale in a lift moving upwards. When the lift accelerates upwards at 2.0 m s−2, the weighing scale reads W. What is the reading on the weighing scale when the lift decelerates at 2.0 m s−2? A 1.5W B 1.0W C 0.83W D 0.66W 5 A number of similar springs, each having the same spring constant, are joined in three arrangements X, Y and Z. The same load is applied to each. What is the order of increasing extension for these arrangements? smallest largest A X Y Z B X Z Y C Z Y X D Y Z X 6 A 100 kg block is pulled at a constant speed of 5.0 m s−1 across a rough horizontal floor by an applied force of 120 N directed 37° above the horizontal. What is the rate at which the applied force does work on the block? A 0 B 360 W C 480 W D 600 W

River Valley High School Pg 6 of 15 H2 Physics 9749 JC 2 Preliminary Examinations 2022 7 Air is enclosed in a cylinder by a gas -tight, frictionless piston of cross -sectional area 3.5  10−3 m2. When atmospheric pressure is 100 kPa, the piston settles 80 mm from the end of the cylinder as shown in Fig. 1. The piston is then pulled out until it is 160 mm from the end of the cylinder as shown in Fig. 2 and is held there. The temperature of the air in the cylinder is now maintained at half of the original value. Fig. 1 Fig. 2 What is the force F required to hold the piston in its new position? A 88 N B 260 N C 350 N D 440 N 8 Two equal masses of an ideal gas initially at the same temperature and pressure are compressed to half of their initial volumes, one of them isothermally, and the other while thermally isolated from its surroundings. Which of the following must be the same for both samples of the gas? A The heat given during compression. B The internal energy of the compressed gas. C The density of the compressed gas. D The work done on the gas during compression.

River Valley High School Pg 7 of 15 H2 Physics 9749 JC 2 Preliminary Examinations 2022 9 When a frictionless and well -insulated bicycle pump is used to pump up a tyre, the air in the tyre becomes hotter than the surrounding air. Which of the following statements best explains this observation? A The internal energy increases because thermal energy is supplied and work is done on the air. B Work is done on the air and since little thermal energy escapes, the internal energy increases. C Work is done on the air and the internal energy remains unchanged. D After compression the air collide more frequently. 10 A straight length of tape winds onto a roll rotating about a fixed axis with constant angular velocity, the radius of the roll increasing at a steady rate. Which of the graphs below correctly shows how the speed v at which the tape moves towards the roll varies with time? A B C D v time 0 0 v time 0 0 v time 0 0 v radius v time 0 0

River Valley High School Pg 8 of 15 H2 Physics 9749 JC 2 Preliminary Examinations 2022 11 A 3.0 kg rock is thrown vertically upwards near the surface of Planet X of mass m with a velocity of 45 m s−1 and it comes to an instantaneous rest 5.2 s later. The same rock is now thrown vertically upwards for 15 m near the surface of Planet Y. The difference in gravitational potential between two points that are 4.0 m vertically apart and near the surface of Planet Y is 6.0 J kg−1. The gravitational field strength can be assumed to be uniform near at the surfaces of both Planet X and Planet Y. If both planets do not have atmosphere, the ratio of the gravitational field strength near the surface of Planet Y to that of Pl