TMJC 2024 H2 Physics P3 QP MS

CANDIDATE NAME ( ) CIVICS GROUP _________________________________________________________________________ H2 PHYSICS 9749/03 Paper 3 Longer Structured Questions 18 September 2024 2 hours Candidates answer on the Question Paper. No Additional Materials are required. _________________________________________________________________________ READ THESE INSTRUCTIONS FIRST Write your name and Civics Group in the spaces at the top of the page. Write in dark blue or black pen on both sides of the paper. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. The use of an approved scientific calculator is expected, where appropriate. Section A Answer all questions. Section B Answer one question only. The number of marks is given in brackets [ ] at the end of each question or part question. ______________________________________________________________________________ This document consists of 25 printed pages and 1 blank page. TAMPINES MERIDIAN JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION For Examiner’s Use Percentage Subtotal P1 / 30 / 15 Subtotal P2 / 80 / 30 Paper 3 1 / 8 2 / 8 3 / 10 4 / 9 5 / 8 6 / 9 7 / 8 8 / 20 9 / 20 Deduction Subtotal P3 / 80 / 35 Subtotal P4 / 55 / 20 Grand total / 100

2 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics Data speed of light in free space c = permeability of free space o = permittivity of free space ε0 = = elementary charge e = the Planck constant h = unified atomic mass constant u = rest mass of electron me = rest mass of proton mp = molar gas constant R = 8.31 J K−1 mol−1 the Avogadro constant NA = the Boltzmann constant k = gravitational constant G = acceleration of free fall g = 8 13.00 10 m s 7 14 10 H m   12 18.85 10 F m  9 11/ 36 10 F m   191.60 10 C 346.63 10 J s 271.66 10 kg 319.11 10 kg 271.67 10 kg 23 16.02 10 mol 23 11.38 10 J K  11 2 26.67 10 N m kg  29.81 m s

3 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics Formulae uniformly accelerated motion s = ut + at2 v2 = u2 + 2as work done on / by a gas W = pV hydrostatic pressure p = gh gravitational potential  = temperature T /K = T /°C + 273.15 pressure of an ideal gas p = mean translational kinetic energy of an ideal gas molecule E = kT displacement of particle in s.h.m. x = xo sin t velocity of particle in s.h.m. v = vo cos t =   electric current I = Anvq resistors in series R = … resistors in parallel = … electric potential V = alternating current / voltage X = xo sin t magnetic flux density due to a long straight wire B = magnetic flux density due to a flat circular coil B = magnetic flux density due to a long solenoid B = radioactive decay x = decay constant = 1 2 GM r 21 3 NmcV 3 2 2 2 ox x 1 2R R  1 / R 1 21/ 1/R R  04 Q r 0 2 d   I 0 2 N r  I 0n I 0expx t   12 ln2 t

4 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics Section A Answer all questions in this section in the spaces provided. 1 (a) State two conditions for an object to be in equilibrium. ……….………………………………………………………………………......................... ……….………………………………………………………………………......................... …………………………………………………………………………….................... [2] (b) A trailer is attached to the towbar of a stationary car as shown in Fig. 1.1. The weight of the trailer is 1900 N. Fig. 1.1 (not to scale) (i) Calculate the vertical force F exerted by the towbar on the trailer. F = …………………………… N [2] 0.35 m 1900 N car trailer F FR 2.5 m towbar

5 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics (ii) FR is the total normal reaction force of the road on the trailer. Calculate the force FR. FR = …………………………… N [2] (c) The car and the trailer move to the left at a constant acceleration of 3.0 m s−2. The resistive force on the trailer is 200 N. Calculate the horizontal force exerted by the towbar on the trailer. horizontal force = …………………………… N [2]

6 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 2 Fig. 2.1 shows an airplane of mass m moving in a horizontal circular motion of radius 12 km and speed v. L is the lift force on the airplane and L makes an angle θ with the vertical. The airplane completes one revolution in 250 s. Fig. 2.1 (a) Explain why the wings of the airplane need to be tilted for it to move in a horizontal circle. …………………………………………………………….………………….……………….. …………………………………………………………….………………………….… [1] (b) Calculate the speed v of the airplane. v = …………………………… m s−1 [2] (c) Calculate the angle θ. θ = …………………………… ° [3] r L θ airplane

7 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics (d) The wings are suddenly tilted for a larger angle θ. State and explain one subsequent effect on the motion of the airplane. …………………………………………………………….………………………….……….. …………………………………………………………….…………………………………... …………………………………………………………….…………………………………... …………………………………………………………….………………………….… [2]

8 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 3 (a) With reference to the kinetic theory of gases, state and explain the pressure and temperature conditions for a real gas to behave like an ideal gas. ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………...... [3] (b) 0.428 mole of an ideal gas undergoes the following thermodynamic processes: Process A: adiabatic compression (no net heat flow). Process B: expansion at constant temperature T. Process C: decrease in pressure at constant volume. Fig. 3.1 shows the variation of pressure p with volume V of the gas. Fig. 3.1 (i) Calculate the temperature T. T = …………………………… K [2] p / Pa V / m3 0 2.42  104 0.280 A 0.120 B C T 350 K 0 4.45  103

9 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics (ii) Show that the amount of thermal energy removed from the system during Process C is 2490 J. [3] (iii) Calculate the work done on the system during Process A. work done = …………………………… J [2]

10 Tampines Meridian Junior College 2024 JC2 Preliminary Examination H2 Physics 4 Two small spherical charged conductors A and B are isolated in space. The variation with distance x of the electric potential V between the conductors along the line joining their centres is shown in Fig. 3.1. Fig. 3.1 The distance D between the two conductors is very much larger than the radii of the conductors. At point Q, the electric potential is a maximum. (a) State and explain the signs of the charge of conductors A and B. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. ……………………………………………………………………………………………... [2] V / V D x / m Q −15.0 −30.0 −95.0 A B P R