EJC 2023 J1 H2 Promo P1 QP

©EJC 2023 9749/J1H2PROMO/2023 [Turn over EUNOIA JUNIOR COLLEGE JC1 PROMO EXAMINATIONS 2023 General Certificate of Education Advanced Level Higher 2 CANDIDATE NAME CIVICS GROUP 2 3 - REGISTRATION NUMBER PHYSICS Multiple Choice 9749/01 September / October 2023 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 and 0 blank pages.

2 ©EJC 2023 9749/J1H2PROMO/2023 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 2023 9749/J1H2PROMO/2023 [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 11 1 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 2023 9749/J1H2PROMO/2023 1 Which of the following values is the best estimate for the volume of a metre rule found in the science laboratory? A 1.5 cm3 B 15 cm3 C 150 cm3 D 1500 cm3 2 Which of the following statements is correct? A A reading is inaccurate when it is not precise. B Checking for zero error on a micrometer before making a measurement will help to reduce random error. C Measuring the time taken for a larger number of oscillations will help to reduce the fractional uncertainty of the period of each oscillation. D To determine the diameter of a sphere, taking more measurements and finding the average value of these measurements will reduce the fractional uncertainty of the diameter. 3 An aircraft is travelling with uniform acceleration along a runway. The runway has a marker board every 300 m. When the aircraft passes one board, it has a speed of 40 m s -1 and when it passes the next one, its speed is 70 m s-1. What is the acceleration of the aircraft? A 5.5 m s-2 B 8.2 m s-2 C 10.8 m s-2 D 15 m s-2 4 A small mass is thrown horizontally at a speed of 0.80 m s-1, 5.0 m above ground. What is the horizontal distance travelled by the mass from the point it is thrown to j ust before it hits the ground? A 0.2 m B 0.4 m C 0.6 m D 0.8 m

5 ©EJC 2023 9749/J1H2PROMO/2023 [Turn over 5 A sandbag is released from a hot air balloon when it is 10 m above the ground and moving vertically upwards at a velocity of 4.0 m s-1. Which of the following graphs best shows how the displacement s of the sandbag from the point of release will vary with time? s / m t / s 0 A s / m t / s 0 B s / m t / s 0 C s / m t / s 0 D

6 ©EJC 2023 9749/J1H2PROMO/2023 6 Two objects of mass m1 and m2 are connected by an inextensible massless string over a frictionless massless pulley as shown. m1 is larger than m2. What is the acceleration a of the two objects in terms of m1, m2 and the acceleration of free fall g? A 12 12 −= + mg mga mm B 12 12 += − mg mga mm C 12 12 += − mma mg mg D 12 12 −= + mma mg mg 7 A 2.0 kg mass travelling at 3.0 m s–1 on a frictionless surface collides inelastically with a 1.0 kg mass travelling at 6.0 m s–1 in the opposite direction. Which line in the table shows the total momentum and the total kinetic energy of the two masses after the collision? Total Momentum / kg m s–1 Total Kinetic Energy / J A 0 27 B 12 27 C 0 20 D 12 20 m1 m2

7 ©EJC 2023 9749/J1H2PROMO/2023 [Turn over 8 A floating platform supports a vehicle of mass of 2.0 × 104 kg above a lake surface. Four hollow metal cylinders of equal volume are installed vertically below the four corners of the floating platform as shown. The cross-sectional area of each cylinder is 12.5 m 2. Lake water has density 1000 kg m –3. How much does the platform rise in the lake when the vehicle is removed from it? A 1.6 m B 0.40 m C 0.20 m D 0.10 m floating platform lake surface hollow metal cylinder

8 ©EJC 2023 9749/J1H2PROMO/2023 9 A forklift truck has a chassis resting on its axles. The chassis has weight W and its centre of gravity G is a distance x from both the front and the rear axles. When a uniform block of weight w (< W) is placed on the front forks as shown in the diagram above, the force exerted by the front axle on the chassis increases by A 2 w B ( ) 2 W –w C 3 2 w D ( ) 3 2 +Ww x x x x G rear axle front axle forks block w chassis

9 ©EJC 2023 9749/J1H2PROMO/2023 [Turn over 10 A wire of length L obeys Hooke’s Law. It is of length x when it is under a tension T. What tension is the wire under when its length is increased to y? A Tx y B Ty x C − − T(x L) (y L) D − − T(y L) (x L) 11 An airplane has two jet engines. If each of the jet engines has an efficiency of 80%, what is the power input of each engine required to allow the plane to fly with a thrust of 200 kN at a speed of 250 m s-1? A 20.0 MW B 31.3 MW C 40.0 MW D 62.5 MW

10 ©EJC 2023 9749/J1H2PROMO/2023 12 A parachutist steps off the edge of a tall cliff and falls without significant drag for 3.0 s before opening the parachute. Which of the following best shows the variation of kinetic energy EK with time t? A B C D EK 3 t / s 0 EK 3 t / s 0 EK 3 t / s 0 EK 3 t / s 0