EJC 2022 J1 H2 PROMO QP PAPER 1

©EJC 2022 9749/J1H2PROMO/2022 [Turn over EUNOIA JUNIOR COLLEGE JC1 PROMO EXAMINATIONS 2022 General Certificate of Education Advanced Level Higher 2 CANDIDATE NAME CIVICS GROUP 2 2 - REGISTRATION NUMBER PHYSICS Multiple Choice 9749/01 4th October 2022 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write your name, civics group and registration number on all the work you hand in. The use of an approved scientific calculator is expected where appropriate. Answer all questions. There are thirty questions in this section. 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. 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. This document consists of 20 printed pages.

2 ©EJC 2022 9749/J1H2PROMO/2022 Data speed of light in free space, ( )( ) 81 71 0 12 1 0 91 19 34 27 31 e 27 p 11 23 1 A 23 1 10 m s 10 H m 10 F m 10 F m 10 C 6 63 10 J s 1 3 00 4 8 85 1 36 1 60 9 11 1 67 66 10 kg 10 kg 10 kg J K mol 6 02 10 8 31 1 38 mol 10 J K c. . / e h. u. m m . . . R. N k . . G ε µπ π − −− −− −− − − − − − −− − −− × × × × × = × = = = × × × = × = = = = = = = × 11 2 2 2 10 N m kg m 67 81 s 6 9 . g. −− − = = × permeability of free space, permittivity of free space, elementary charge, the Planck constant, unified atomic mass constant, rest mass of electron, rest mass of proton, molar gas constant, the Avogadro constant, the Boltzmann constant, gravitational constant, acceleration of free fall,

3 ©EJC 2022 9749/J1H2PROMO/2022 [Turn over Formulae uniformly accelerated motion, ( ) ( ) 2 22 2 0 0 22 0 12 12 0 0 0 0 0 0 1 2 1 2 2 / K / C 273 15 1 3 3 2 sin cos 111 4 sin 2 2 exp ln2 at u as V p gh Gm r TT . Nmpc V kT xx t vv t xx R /R /R /R QV r xx t B d NB r s ut v Wp t E Bn t Anvq RR xx ρ φ ω ω ω πε ω µ π µ µ λ λ = + ∆ = =− = °+ = = = = ±− ++ =++ = = = = = − = = + = = = = = I I I I   work done on/by a gas, hydrostatic pressure, gravitational potential, temperature, pressure of an ideal gas, mean translational kinetic energy of an ideal gas molecule displacement of particle in s.h.m. velocity of particle in s.h.m. electric current, resistors in series, resistors in parallel, electric potential, alternating current/voltage, magnetic flux density due to a long straight wire magnetic flux density due to a flat circular coil magnetic flux density due to a long solenoid radioactive decay, decay constant

4 ©EJC 2022 9749/J1H2PROMO/2022 1 The speed of sound in a gas is given by the following formula γpv= d where p is the gas pressure d is the gas density v is the speed of sound Which of the following correctly indicates the unit for γ ? A 1m s− B 22m s − C 22m s− D dimensionless 2 A car is travelling at 80 km h−1 due east and a lorry is travelling at 50 km h −1 with a bearing of 300°. What is the relative velocity of the lorry with respect to the car? magnitude bearing A 126 km h−1 281.5° B 126 km h−1 101.4° C 126 km h−1 78.5° D 44 km h−1 5.4°

5 ©EJC 2022 9749/J1H2PROMO/2022 [Turn over 3 A series of measurements of the diameter of a ball bearing made by four students are shown in the table below. The actual diameter of the ball bearing is 0.85 cm. Student A Student B Student C Student D First Measurement 0.91 0.88 0.83 0.84 Second Measurement 0.91 0.85 0.89 0.87 Third Measurement 0.84 0.85 0.95 0.83 Fourth Measurement 0.74 0.82 0.78 0.86 Which student’s measurements are accurate but not precise? A Student A B Student B C Student C D Student D 4 Two cars X and Y are initially travelling on a straight level road. Car Y is 450 m ahead of Car X at t = 0 s. The velocity -time graph for cars X and Y in the first 12.0 s are shown in the diagram below. What is the minimum distance between the two cars within the first 12.0 s? A 45 m B 150 m C 300 m D 405 m 85 75 55 35 velocity / m s−1 time / s 0 2.0 5.0 12.0 Car X: Car Y: 3.0

6 ©EJC 2022 9749/J1H2PROMO/2022 5 A rubber ball is dropped from a height of about 2 .0 m and undergoes an elastic collision with the floor. Assuming no air resistance, which of the following graphs best represent s the variation of the distance s above the floor with time t for the bouncing ball from the instant the ball is dropped? s / m t / s A s / m B s / m t / s C s / m t / s D t / s 0 0 0 0

7 ©EJC 2022 9749/J1H2PROMO/2022 [Turn over 6 The acceleration of free fall on the Moon is one-sixth of that on Earth. On Earth it takes time t for a stone to fall from rest a distance of 6 m. What is the time taken for a stone to fall from rest a distance of 3 m on the Moon? A 3t B 3 t C 3t D 3 t 7 Which one of the following pairs of forces is not a valid example of action and reaction to which Newton’s Third Law of motion applies? A The centripetal force holding a satellite in orbit round the Earth and the weight of the satellite. B The force exerted by a man pushing a wall and the force exerted by the wall on the man. C The forces of attraction experienced by each of the magnets placed near to each other. D The forces of attraction between an electron and a proton in a hydrogen atom. 8 When a constant force of 4.0 N acts on a mass of 2.0 kg for a time of 2.0 s, what is the rate of change of momentum? A 2.0 kg m s−2 B 4.0 kg m s−2 C 8.0 kg m s−2 D 16 kg m s−2

8 ©EJC 2022 9749/J1H2PROMO/2022 9 In the figure below, a jet of water that is sprayed parallel to the floor from a hose is directed towards a wall, at 30° to the surface of the wall. The water is then reflected at 30° to the wall. The figure below shows the top view of the jet of water approaching and reflecting from the wall. The mass flow rate of the jet from the hose is 2.5 kg s −1 and it approaches the wall with a speed of 5.0 m s−1. Given that the jet of water hits the wall elastically, what is the magnitude of the force exerted by the water on the wall? A 6.3 N B 11 N C 13 N D 22 N 10 In the figure below, Liquid X and Liquid Y are used to fill the arms of a flexible U-tube. Liquid X and Liquid Y do not mix. Height difference between the two liquid surfaces is given by ∆h. Which of the following statements is true? A Point P and Point Q are at the same pressure. B Point R and Point S are at the same pressure. C ∆h can vary by adjusting the arms of the flexible tube if the liquids do not overflow. D ∆h can be zero by adding more liquid Y on the right arm. Liquid Y Liquid X Point Q Point P Point S Point R ∆h 30° 30° hose

9 ©EJC 2022 9749/J1H2PROMO/2022 [Turn over 11 A non-uniform beam has one of its end attached to a string and the other end resting on a rough wall. The centre of the gravity G of the beam is shown in the diagram below. Which of the above arrows correctly shows the force acting by the beam on the wall? 12 A 1.0 kg ball is dropped from a height of 15.0 cm above an uncompressed spring with unknown spring constant that obeys Hooke’s Law. Upon impact between the spring and the ball, the spring undergoes a maximum compression of 5.0 cm. What is the average force exerted on the ball by the spring during this impact? A 9.81 N B 19.6 N C 29.4 N D 39.2 N A B C D G 15.0 cm

10 ©EJC 2022 9749/J1H2PROMO/2022 13 A car of mass 1500 kg is travelling as shown. Its engine develops a constant power of 108 kW during the journey, regardless of road conditions. After travelling on a level road with a constant velocity of 15 m s−1, the car encountered a