2013_JJC_H2_Physics_P3

JJC 2013 9646/JC2 Prelim P3/2013 [Turn Over JURONG JUNIOR COLLEGE 2013 JC2 Preliminary Examination Name Class 12S PHYSICS Higher 2 Structured Questions Candidates answer on the Question Paper. No additional materials are required. 9646/3 16 Sep 2013 2 hour READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name and class in the space provided at the top of this page. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use highlighters, glue or correction fluid. Section A Answer every question. Section B Answer any two questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Section A 1 2 3 4 5 Section B 6 7 8 Total (This question paper consists of 22 printed pages)

JJC 2013 9646/JC2 Prelim P3/2013 [Turn Over 2 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 Formulae uniformly accelerated motion, s = ut + 1 2 at2 v2 = u2 + 2as work done on/by a gas, W = p V hydrostatic pressure, p = gh gravitational potential,  =  Gm r displacement of particle in s.h.m., x = xo sin t velocity of particle in s.h.m., v = vo cos t v = 22() ox x mean kinetic energy of a molecule of an ideal gas E = 3 2 kT resistors in series, R = R1 + R2 + . . . resistors in parallel, 1/R = 1/R1 + 1/R2 + . . . electric potential, V = o Q ε r4 alternating current / voltage, x = xo sin t transmission coefficient, T  exp(2kd) where k = 2 2 8( )mU E h  radioactive decay x = xo exp(-λt) decay constant λ = 1/ 2 0.693 t

JJC 2013 9646/JC2 Prelim P3/2013 [Turn Over 3 Section A Answer all the questions in this Section. 1 (a) A stone is being thrown from the top of a cliff with a velocity of 20.0 m s-1 at an angle of 60 to the horizontal, as shown in Fig. 1.1. Fig. 1.1 On the axes of Fig. 1.2, draw graphs to represent the variation with time of (i) VH, the horizontal component of the velocity, [1] (ii) VV, the vertical component of the velocity of the stone. Identify your graphs. [3] Fig. 1.2 20.0 m s-1 velocity / m s-1 time/s 20 10 0 -10 -20 1.0 2.0

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