(DHS) 2024 Prelim Phy P1 final

© DHS 2024 9749/01 [Turn over Name: Centre/Index Number: Class: DUNMAN HIGH SCHOOL Preliminary Examination Year 6 H2 PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 9749/01 23 September 2024 1 hour READ THESE INSTRUCTIONS FIRST Write your centre number, index number, name and class at the top of this page. Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. There are thirty questions on this paper. Answer all questions. 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. Read the instructions on the Answer Sheet very carefully. 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 18 printed pages and 2 blank pages.

2 © DHS 2024 9749/01 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

3 © DHS 2024 9749/01 [Turn over Formulae uniformly accelerated motion s = 21 2ut at+ v2 = 2 2u as+ work done on/by a gas W = pV hydrostatic pressure p = gh gravitational potential  = Gm r− temperature T/K = T/oC + 273.15 pressure of an ideal gas p = 21 3 Nm cV mean translational kinetic energy of an ideal gas molecule E = 3 2 kT displacement of particle in s.h.m. x = x0 sin t velocity of particle in s.h.m. v = v0 cos t = 22 0 xx− electric current I = Anvq resistors in series R = R1 + R2 + . . . resistors in parallel 1/R = 1/R1 + 1/R2 + . . . electric potential V = 04 Q r alternating current / voltage x = x0 sin t magnetic flux density due to a long straight wire B = 2 o d   I magnetic flux density due to a flat circular coil B = 2 oN r  I magnetic flux density due to a long solenoid B = on I radioactive decay x = x0 exp(−t) decay constant  = 1 2 ln2 t

4 © DHS 2024 9749/01 1 Which expression could be correct for the velocity v of the ocean waves in terms of the density of sea water , the acceleration of free fall g, the depth of the ocean h, and the wavelength ? A √g B √g h C √gh D √ g  2 A man pushing a mop across a floor causes it to undergo two displacements. The first has a magnitude of 150 cm and makes an angle of 120° with the positive x-axis as shown below. The resultant displacement has a magnitude of 140 cm and is directed at an angle of 30.0° to the positive x-axis. Both angles are measured anti -clockwise with respect to the positive x-axis. What are the magnitude and direction of the second displacement? magnitude / cm angle to the positive x-axis / 0 A 205 −17 B 205 17 C 290 −90 D 290 90 3 A car is travelling at a speed of 15 m s -1 and can be brought to rest with a uniform deceleration in 1.2 s if the brakes are applied. The reaction time of the driver is 0.10 s. What is the closest distance that the moving car can be to a stationary object if a collision is to be avoided? A 9.0 m B 10.5 m C 12.0 m D 19.5 m x 1200 150 cm

5 © DHS 2024 9749/01 [Turn over 4 Two balls P and Q, of equal mass, move along a straight line directly towards each other as shown. Ball P has velocity 1.30 m s–1 to the right. Ball Q has velocity 0.50 m s–1 to the left. P and Q collide with one another. The collision is perfectly elastic and the total momentum is conserved. Which diagram correctly shows the motion of P and Q after the collision?

6 © DHS 2024 9749/01 5 The figure shows a block of mass m1 resting on a block of mass m2 which is resting on a table. m1 is larger than m2. Which of the following statements is correct? A The weight of m1 and the force exerted on m1 by m2 form an action-reaction pair. B The magnitude of the force exerted on m1 by m2 is equal to the magnitude of the force exerted on m2 by m1. C The total force from the table on the bottom block depends on which block is placed below. D The force exerted by m1 on m2 is larger if m2 is now placed above m1. force X force Y A air resistance resultant force B air resistance weight C upthrust resultant force D upthrust weight 6 A ball falls from rest through air and eventually reaches a constant velocity. For this fall, forces X and Y vary with time as shown. What are forces X and Y ? m1 m2

7 © DHS 2024 9749/01 [Turn over 7 A weight W hangs from a troll ey that runs along a rail. The troll ey moves horizontally through a distance p and simultaneously raises the weight through a height q. As a result, the weight moves through a distance r from X to Y. It starts and finishes at rest. How much work is done on the weight during this process? A Wp B W(p + q) C Wq D Wr 8 An airplane has two jet engines. If each of the jet engines has an efficiency of 80%, what is the power input of each jet engine required to allow the airplane to fly with a thrust of 200 kN at a speed of 250 m s-1? A 25.0 MW B 31.3 MW C 62.5 MW D 140 MW 10 When a satellite is at its launch site on the Earth’s surface, it is found to have a weight W. When the satellite is placed in a circular orbit at a height h = 6R above the Earth’s surface, where R is the radius of the Earth, what is the gravitational force acting on the satellite? A 6 W B 7 W C 36 W D 49 W 9 The minute hand of a large clock is 45 cm long. What is its average angular velocity? A 6.00 rad s-1 B 1.05 x 10-1 rad s-1 C 1.75 x 10-3 rad s-1 D 5.24 x 10-3 rad s-1

8 © DHS 2024 9749/01 11 Several satellites are in geostationary orbits around the Earth. Which of the following quantities is not necessarily the same for all the satellites? A angular velocity B centripetal acceleration C kinetic energy D orbital period 12 In a mixture of 2 monatomic gases X and Y , the molecules of Y have twice the mass of those of X. The mixture is in thermal equilibrium and the molecules of Y have a mean translational kinetic energy of 6.0 × 10-21 J. What is the mean translational kinetic energy of the molecules of X? A 3.0 × 10-21 J B 4.2 × 10-21 J C 6.0 × 10-21 J D 8.5 × 10-21 J 13 Heat is supplied at a constant rate to a liquid in a beaker. Just before it begins to boil, the temperature of the liquid was rising at 4.0 K per minute. All the liquid are boiled away after 40 minutes. The heat capacity of the beaker may be taken to be negligible. What is the value of the ratio specific heat capacity specific latent heat of vaporisation ? A 11 K10 − B 11 K40 − C 11 K160 − D 11 K640 − 14. An object performs linear simple harmonic motion between P and Q. X and Y are the midpoints between the equilibrium position O with P and Q respectively as shown. If the peri