9702/02

October/November 2006 1 hour

Candidates answer on the Question Paper. No Additional Materials are required.

w w w e tr .X m eP e ap .c rs om

READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. You may lose marks if you do not show your working or if you do not use appropriate units. 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. DO NOT WRITE IN THE BARCODE. DO NOT WRITE IN THE GREY AREAS BETWEEN THE PAGES. For Examiner’s Use 1 2 3 4 5 6 7 Total This document consists of 14 printed pages and 2 blank pages. SP (SJF3678/CG) S98413/3 © UCLES 2006

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2 Data speed of light in free space, 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, c = 3.00 × 10 8 m s –1 0 0

=4

× 10 –7 H m–1

= 8.85 × 10 –12 F m–1

e = 1.60 × 10 –19 C h = 6.63 × 10 –34 J s u = 1.66 × 10 –27 kg me = 9.11 × 10 –31 kg mp = 1.67 × 10 –27 kg R = 8.31 J K –1 mol –1 NA = 6.02 × 10 23 mol –1 k = 1.38 × 10 –23 J K –1 G = 6.67 × 10 –11 N m 2 kg –2 g = 9.81 m s –2

© UCLES 2006

9702/02/O/N/06

3 Formulae uniformly accelerated motion, s = ut + at 2 v 2 = u 2 + 2as W =p V

work done on/by a gas, gravitational potential, simple harmonic motion, velocity of particle in s.h.m.,

φ = – Gm

r a =–

2x

v = v0 cos t v = ± √(x 2 – x 2) 0 R = R1 + R 2 + . . . 1/R = 1/R1 + 1/R2 + . . . V = Q 4 0r

resistors in series, resistors in parallel, electric potential, capacitors in series, capacitors in parallel, energy of charged capacitor, alternating current/voltage, hydrostatic pressure, pressure of an ideal gas, radioactive decay, decay constant,

1/C = 1/C1 + 1/C2 + . . . C = C1 + C2 + . . . W = QV

x = x0 sin t

p = qgh p = Nm 2 V

x = x0 exp(– t )

= 0.693 t 3H02 8 G

critical density of matter in the Universe,

q0 =

equation of continuity, Bernoulli equation (simplified), Stokes’ law, Reynolds’ number, drag force in turbulent flow, © UCLES 2006

Av = constant

2 2 p1 + qv1 = p2 + qv2

F = Ar v Re =

qv r

F = Br 2qv 2

9702/02/O/N/06

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4 Answer all the questions in the spaces provided. 1 (a) Define what is meant by (i) work done, ................................................................................................................................... ................................................................................................................................... .............................................................................................................................. [2] (ii) power. ................................................................................................................................... .............................................................................................................................. [1] For Examiner’s Use

(b) A force F is acting on a body that is moving with velocity v in the direction of the force. Derive an expression relating the power P dissipated by the force to F and v.

[2] (c) A car of mass 1900 kg accelerates from rest to a speed of 27 m s–1 in 8.1 s. (i) Calculate the average rate at which kinetic energy is supplied to the car during the acceleration.

rate = ………………………. W [2]

© UCLES 2006...