2013 IJC H2 Physics P1

INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION 2 in preparation for General Certificate of Education Advanced Level Higher 2 CANDIDATE NAME CLASS INDEX NUMBER PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple choice answer sheet 9646/01 16 September 2013 1 hour 15 minutes READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, civics group and index number on the Answer sheet in the spaces provided unless this has been done for you. There are forty 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. This document consists of 17 printed pages and 1 blank page. Innova Junior College [Turn over

© IJC 2013 9646/Prelim2/01/13 [Turn over 2 Data speed of light in free space, c = 3.00 x 108 m s-1 permeability of free space, o = 4 x 10-7 H m-1 permittivity of free space, o = 8.85 x 10-12 F m-1  (1/(36)) x 10-9 F m-1 elementary charge, e = 1.60 x 10-19 C the Planck constant, h = 6.63 x 10-34 J s unified atomic mass constant, u = 1.66 x 10-27 kg rest mass of electron, me = 9.11 x 10-31 kg rest mass of proton, mp = 1.67 x 10-27 kg molar gas constant, R = 8.31 J K-1 mol-1 the Avogadro constant, NA = 6.02 x 1023 mol-1 the Boltzmann constant, k = 1.38 x 10-23 J K-1 gravitational constant, G = 6.67 x 10-11 N m2 kg-2 acceleration of free fall, g = 9.81 m s-2 Formulae uniformly accelerated motion, s = ut + ½at2 v2 = u2+ 2as work done on/by a gas, W = pV mean kinetic energy of a molecule of an ideal gas E = kT2 3 hydrostatic pressure, p = gh gravitational potential,  = GM r displacement of particle in s.h.m. x = xosin ωt velocity of particle in s.h.m. v = vocos ωt   22 oxx  resistors in series, R = R1 + R2 + … resistors in parallel, 1/R = 1/R1 + 1/R2 + … electric potential V = Q/4or alternating current/voltage, x = xo sint transmission coefficient T = exp (-2kd) where k =   2 2 8 m U E h   radioactive decay, x = xo exp(-t) decay constant,  = ½ 0.693 t

3 © IJC 2013 9646/Prelim2/01/13 [Turn over 1 Thermal conductivity k is the property of a material that indicates its ability to conduct heat. The rate of flow of heat energy dQ dt can be found from the equation L TTkAdt dQ 12  where k is the thermal conductivity, A is the cross sectional area of the conducting surface 12 TT  is the temperature difference across the surface and L is the thickness of the conducting surface separating the two temperatures. What is the S.I. unit for k? A W m−1 K−1 B W m−2 K−2 C W m−3 K−1 D J m−2 K−1 2 A runner runs a distance of 100 metres. Measured with a tape, this has an uncertainty of 20 cm. He clocks 10.0 seconds but knows that the timing has an uncertainty of 0.5 seconds due to human error in the timing. The average speed of the runner can be expressed as A 10.0 0.5 m s−1 B 10.00 0.52 m s−1 C 10.0 0.7 m s−1 D 10 3 m s−1    

© IJC 2013 9646/Prelim2/01/13 [Turn over 4 3 The diagram shows a laboratory experiment in which a feather falls from rest in a long evacuated vertical tube of length L. The feather takes time T to fall from the top to the bottom of the tube. How far will the feather have fallen from the top of the tube in time 0.50T? A 0.13 L B 0.25 L C 0.38 L D 0.50 L 4 The dotted line shows the path of a competitor in a ski-jumping competition. Ignoring air resistance, which graph best represents the variation of his speed v with the horizontal distance x covered from the start of his jump at P before landing at Q? A B C D

5 © IJC 2013 9646/Prelim2/01/13 [Turn over 5 In a tropical rainstorm, 40 mm of rain fell in one hour. Assuming that the raindrops struck an adequately drained roof normally with an average speed of 10 m s −1, find the pressure exerted on the roof by the rain. [Density of water = 1.0 × 103 kg m−3] A 4.00 × 10−2 Pa B 1.11 × 10−4 Pa C 1.11 × 10−1 Pa D 4.00 × 102 Pa 6 A block of mass 1.0 kg is pulled from rest down a smooth inclined plane with a constant horizontal force F of 5.0 N as shown. What is the speed of the block after travelling 1.0 m down the slope from its initial position? A 2.9 m s−1 B 3.1 m s−1 C 4.3 m s−1 D 4.5 m s−1 7 A 4.25 g bullet travelling horizontally with a speed of 375 m s −1 is fired into a wooden block with mass 1.12 kg, initially at rest on a level frictionless surface. The bullet passes through the block and emerges with its speed reduced to 122 m s−1. How fast is the block moving just after the bullet emerges from it? A 0.96 m s−1 B 1.42 m s−1 C 9.60 m s−1 D 21.84 m s−1 30 ° 5.0 N

© IJC 2013 9646/Prelim2/01/13 [Turn over 6 8 A light rod is acted upon by three forces P, Q and R. Which diagram could show the position and direction of each of the forces when the rod is in equilibrium? A B C D 9 The diagram below shows two boxes X and Y of masses 2.0 kg and 3.0 kg respectively connected by a light inextensible rope passing over a light, free-running pulley. X and Y are on smooth inclined planes. X starts from rest and moves up the plane inclined at 30 o to the horizontal. What will be the final speed of Y after X has travelled 3.0 m along the plane? A 1.6 m s−1 B 2.3 ms−1 C 3.3 m s−1 D 4.3 m s−1 10 A motor driving a pump raises 0.10 m 3 of water through a vertical height of 5 .0 m in a time of 10 minutes. If the efficiency of the motor is 60%, what is the power input to the motor? (Take density of water to be 1000 kg m−3) A 4.9 W B 13.6 W C 8.2 W D 490 W

7 © IJC 2013 9646/Prelim2/01/13 [Turn over 11 A particle of constant mass travels in uniform circular motion. Which of the following correctly describes the linear velocity, angular velocity and kinetic energy of the particle? Linear velocity Angular velocity Kinetic energy A varying constant constant B varying constant varying C constant varying constant D constant varying varying 12 A body is moved from point P on Earth’s surface to another point Q further from Earth’s centre. Which of the following statements about the gravitational potential energy of the body at the two points is correct? Take the gravitational potential to be zero at an infinite distance from Earth. A It is positive at both points and numerically greater at Q than at P. B It is positive at both points and numerically greater at P than at Q. C It is negative at both points and numerically greater at Q than at P. D It is negative at both points and numerically greater at P than at Q. 13 Which of the following statement s about the weight of a body at the Equator compared with its weight at a pole is correct? Assume the Earth to be a uniform sphere rotating about an axis through the poles. A The weight is greater at the equator because the angular velocity of Earth is greater at the Equator than at a pole. B The weight is greater at the equator because the weight at the equator is given by the sum of the gravitational attraction of the Earth and the centripetal force due to the circular motion of the body. C The weight is smaller at the equator because the gravitational attraction of the Earth must provide both the weight and the centripetal force due to the circular motio