Physical Sciences Grade 12 P1 NSC June 2013 QP (Eng)

basic education Department: Basic Education REPUBLIC OF SOUTH AFRICA SENIOR CERTIFICATE EXAMINATION PHYSICAL SCIENCE P1 PHYSICS STANDARD GRADE 2013 MARKS: 150 PHYSICAL SCIENCE SG: Paper 1 : a042E TIME: 2 hours 30421E This question paper consists of 12 pages, 2 data sheets and 1 answer sheet. X@5 tM Copyright reserved GAUTENG Please turn over

Downloaded from hlayiso.com Physical Science/SG/P1 2 DBE/2013 SCE INSTRUCTIONS AND INFORMATION 7 Write your centre number and examination number in the appropriate spaces on the ANSWER BOOK. A Answer ALL the questions. c You may use a non-programmable calculator. 4. You may use appropriate mathematical instruments. Ey, Data sheets are attached for your use. 6. NOTE: The following circuit diagram symbols are used in this paper: Resistor: +} instead of —WW\4+-— Bulb: «+ instead of —QMD— 7. You may forfeit marks if you do not follow instructions. QUESTION 1 INSTRUCTIONS AND INFORMATION _ Answer this question on the attached ANSWER SHEET. Write your centre number and examination number in the appropriate spaces. _ Various options are given as possible answers to the following questions. Each question as only ONE answer. Choose the correct or best answer and make a cross (X) in the block (A—D) next to the question number (1.1—1.15) on the ANSWER SHEET. 3. Do not make any other marks on the ANSWER SHEET. Any calculations or writing that may be necessary when answering this question should be done in the ANSWER BOOK and must be deleted clearly by means of a line drawn across the page. 4. If more than ONE block is marked per question, no marks will be awarded for that answer. PLACE THE COMPLETED ANSWER SHEET INSIDE THE FRONT COVER OF YOUR ANSWER BOOK. EXAMPLE: QUESTION: The symbol for the SI unit of time is ... whem 3ea° ANSWER: A;|B D Conon reser A A Pesotum oer

Downloaded from hlayiso.com Physical Science/SG/P1 3 DBE/2013 SCE 1.1 Which ONE of the following pairs consist of a vector as well as a scalar quantity? A Force and acceleration B_ Energy and power C_ Speed and distance D Impulse and mass (3) 1.2 A block is being pulled with a force F at an angle o with the horizontal, as shown below. F For which ONE of the following angles, o, will the block experience the biggest acceleration? A 0° B 45° Cc 60° D 90° (3) ae A glass of water is placed on top of a thin piece of cardboard on a smooth table. The cardboard is jerked (pulled quickly) horizontally to the right and the glass hardly moves. (e T Which ONE of the following is best illustrated by this demonstration? Conservation of momentum Conservation of energy Newton's first law 00 WwW DY Newton's second law (3) Cohresaved AN Pease um ov

Downloaded from hlayiso.com Physical Science/SG/P1 4 DBE/2013 SCE 1.4 A bricklayer drops a brick from the top of a building. While it is falling, the 1.5 1.6 acceleration of the brick is ... A__ independent of the mass of the brick. B_ directly proportional to the mass of the brick. C__ inversely proportional to the mass of the brick. D_ inversely proportional to the product of the mass of the earth and the mass of the brick. (3) Consider the following equation: puny r2 F Which ONE of the following statements regarding the above formula is FALSE? Ar represents the distance between the centres of m; and mp. B_ The force F is inversely proportional tor’. C_ The value of G is less on the moon than on earth. D_ The force F is directly proportional to the product of m; and mz. (3) What is the correct SI unit of the expression tat”? m.s@ m.s m is) @ wi) 22 m.s" (3) CT THis) FANUC AMMT VEATCH A iene

Downloaded from hlayiso.com Physical Science/SG/P1 5 DBE/2013 SCE 1.7 A lift of mass m is moving upwards at constant velocity. cable lift mass m What will be the force that the cable exerts on the lift? (Ignore the weight of the cable.) A Zero B 10m C Smaller than 10m D_ Greater than 10m (3) 1.8 A trolley, moving with a speed u_ past point P at the top of an inclined plane, rolls down the plane and moves past point Q at the bottom with speed v. Ignore friction. uy, —_ Q Which ONE of the following is TRUE? A Ep at P= Ex at Q B EpatP>ExatQ Cc E mechanical at P= E mechanical atQ D Enmechanical at P > Emechanical at Q (3) Conese A YA A Pease tum over

Downloaded from hlayiso.com Physical Science/SG/P1 6 DBE/2013 SCE 1.9 Which ONE of the following combinations of base units represents change in momentum? A kg.m.s* B kg.m2.s* Cc kg.m?.s? D kg.m.s™ (3) 1.10 Two trolleys, X and Y, with masses of 2 kg and 4 kg respectively, are both moving at speed v to the right. Ignore friction. Y Xx Ba Which ONE of the following is CORRECT regarding the momentum of the two trolleys? A px= Py B px> py C px<py D Momentums cannot be determined with the information provided. (3) 1.11 Two large parallel metal plates are oppositely charged by applying a potential difference across the plates. Which ONE of the following statements regarding the electric field strength between the plates is CORRECT? A The electric field strength is the same everywhere. B_ The electric field strength is greater near the positive plate. C_ The electric field strength is greater near the negative plate. D The electric field strength is a maximum exactly midway between the plates. (3) Cony rosared AO A A Pease um over

Downloaded from hlayiso.com Physical Science/SG/P1 7 DBE/2013 SCE 2 Two small identical, positively charged spheres, P and Q, carrying identical charges, are placed a distance apart. W, X, Y and Z are points in the resultant electric field formed by P and Q. °X P Q Y: @ eZ t ) WwW At which point is the electric field strength most likely to be zero? A W = Cc Y D X (3) Two identical metal spheres, X and Y, on insulated stands, carry charges of +8 nC and -4 nC respectively. X and Y are allowed to touch and are then separated again. xX Y +8 nC -4nCc What is the polarity of the charges on X and Y and the nature of the force that they experience after they have been separated again? POLARITY OF CHARGE NATURE OF FORCE A negative repulsive B negative attractive Cc positive repulsive D positive attractive (3) Cony rosne A AA Rese um over

Physical Science/SG/P1 8 Downloaded from hlayiso.com DBE/2013 SCE 1.14 KL and MN are parallel, current-carrying conductors. K M [ N Conductor KL attracts conductor MN because ... A B Cc D the electric fields attract each other. the charged particles moving in the conductors attract each other. conductor MN is in the electric field of conductor KL. conductor MN is in the magnetic field of conductor KL (3) 1.15 Which ONE of the following connections of an ammeter and a voltmeter is CORRECT in order to determine the resistance of a resistor in an electric circuit? CONNECTION OF CONNECTION OF AMMETER VOLTMETER A in series with resistor in parallel across resistor B in parallel across resistor in parallel across resistor Cc in series with resistor in series with resistor D in parallel across resistor in series with resistor (3) [45] Copyright reserved Please turn over GAUTENG

Physical Science/SG/P1 9 DBE/2013 Downloaded from hlayiso.com SCE ANSWER QUESTIONS 2-8 IN THE ANSWER BOOK. INSTRUCTIONS AND INFORMATION 1. 2. 3. 4. Start EACH question on a NEW page in the ANSWER BOOK. Leave ONE line between two subquestions, for example between QUESTION 2.1 and QUESTION 2.2. Show the formulae and substitutions in ALL calculations. Number the answers exactly the same as the questions. QUESTION 2 (START ON A NEW PAGE.) A crane is used to lift a container of mass 500 kg from a dock onto a ship. The container must be pulled sideways in order to be positioned above the hold. A man on the deck of the ship fixes a rope to the container at the same point, O, where a cable is fixed to the container. He pulls horizontally until the cable makes an angle of 20° with the vertical. The container is now stationary above the hold. 2.1 2.2 2.3 What is the magnitude of the gravitational force acting on the container? Draw a labelled triangle of forces (not necessarily to scale) for the forces acting on point O. Also indicate the size of TWO of the angles. Determine, either by calculation or by means of an accurate construction (using a scale where 1 cm represents 500 N), the magnitude of the horizontal force exerted by the man on the rope, AND the magnitude of the force exerted by the cable. (2) (5) (7) [14] Conyatresene JN A Pose tum over

Downloaded from hlayiso.com Physical Science/SG/P1 10 DBE/2013 SCE QUESTION 3 (START ON A NEW PAGE.) A truck travels at an initial speed of 20 m.s™ along a straight horizontal road, and then accelerates at 2 m.s* for 10 s. 3.1 Calculate the distance which the truck covers while it is accelerating. (4) 3.2 What is the speed of the truck after the 10 s? (4) After 10 s the truck moves at a constant velocity. The truck driver suddenly sees a stationary vehicle blocking the road 150 m ahead of him. He brakes nan and the truck slows down at a constant acceleration of magnitude 6 m.s® 3.3 Will the truck stop before reaching the stationary vehicle? Support your answer with an appropriate calculation. (6) [14] QUESTION 4 (START ON A NEW PAGE.) Two identical wooden blocks, A and B, each of mass 5 kg and with a string attached to each, are placed on two horizontal surfaces. The string tied to block Al is pulled with a force F,, causing the block to accelerate to the right at 2 m. s*. Block B also accelerates to the right at 2 m.s” ? when a force Fo is applied to the string attached to it. Block A moves along a frictionless surface, while block B experiences a frictional force of 3. N. _ 2 = Z a=2ms a=2ms A Fy B Fo 5 kg “ 3N 5 kg : 4.1 Explain briefly what is meant by accelerates at 2 ms”. (2) 4.2 Calculate the magnitude of: 4.2.1 Force F, (3) 4.2.2 Force F2 (3) Both strings are now cut, so that forces F; and F2 are simultaneously removed from blocks A and B. Ignore air friction in both cases. 4.3 Describe the motion of block A after the string has been cut. (2) 44 Name a law of physics applicable to the motion of block A and use it to briefly explain your answer. (3) 45 Describe the motion of block B after the string has been cut. (2) 4.6 Name a law of physics applicable to the motion of block B and use it to briefly explain your answer. (3) [18] Cont reser A A Pease um oer

Downloaded from hlayiso.com Physical Science/SG/P1 11 DBE/2013 SCE QUESTION 5 (START ON A NEW PAGE.) A brick of mass 2 kg is dropped vertically onto a block of mass 3 kg, which is moving to the right at 1,5 m.s” in a straight line along a horizontal track. Ignore friction. 2kg | 1,5ms" ——_— 3 kg 5.1 State the law of conservation of linear momentum in words. (3) 5.2 What is the magnitude of the momentum of the block before the brick falls onto it? (4) 5.3 Calculate the speed of the block-and-brick combination after the brick landed on the block. (4) [11] QUESTION 6 (START ON A NEW PAGE.) A pupil accidentally pushes her pencil case, with mass 0,2 kg, off a window sill, which is 4,05 m above the ground. Ignore friction. 6.1 Calculate the gravitational potential energy of the pencil case relative to the ground just before it starts to fall. (4) 6.2 Use the law of conservation of mechanical.energy to calculate the speed with which the pencil case hits the ground. (5) [9] QUESTION 7 (START ON A NEW PAGE.) Two point charges each carry a charge of -3,2 x 10 *C. Their centres are 2 cm apart. Ignore the effects of gravitational force. TA Draw a neat sketch of the resultant electric field pattern due to the two point charges. (4) 7.2 Calculate how many electrons are in excess on a point charge of -3,2 x 10°C. (2) ae Determine the magnitude and direction of the force which the one point charge exerts on the other. (6) [12] Conrresaned NN 0 Pease tun or

Downloaded from hlayiso.com Physical Science/SG/P1 12 DBE/2013 SCE QUESTION 8 (START ON A NEW PAGE.) The battery in the circuit diagram below has negligible internal resistance. 24V Oni ©) 6,80 L[ 30 |e Ss Switch S is OPEN. 8.1 The emf of the battery is 24 V. State briefly what is meant by this. 8.2 Calculate the reading on the ammeter when switch S is OPEN. Switch S is now CLOSED. 8.3 What will be the effect on the ammeter reading if switch S is closed? Answer only INCREASES, DECREASES or REMAINS THE SAME. Explain briefly. 8.4 Calculate the total resistance of the circuit. 8.5 Calculate the reading on the ammeter. 8.6 Calculate the reading on the voltmeter. 8.7 Calculate the current in the 3 Q resistor of the parallel combination. 8.8 Calculate the power output of the resistors connected in parallel. TOTAL: Copyatresene A YA 0 A (3) (4) (3) (4) (3) (3) (3) (4) [27] 150

Physical Science/SG/P1 SCE DATA FOR PHYSICAL SCIENCE PAPER | (PHYSICS) Downloaded from hlayiso.com 1 DBE/2013 GEGEWENS VIR NATUUR- EN SKEIKUNDE VRAESTEL | (FISIKA) TABLE 1: PHYSICAL CONSTANTS TABEL 1: FISIESE KONSTANTES NAME/NAAM SYMBOL/SIMBOOL VALUE/WAARDE Acceleration due to gravity Swaartekragversnelling 10 m.s? Gravitational constant Swaartekragkonstante 6,7 x 10°" N.m2.kg? Charge on electron Lading van elektron -1,6 x 107°C MATHEMATICAL AIDS/WISKUNDIGE HULPMIDDELS B A sinA _ sinB__ sinC a b c c? = a? + b* - 2abcosC Copyright reserved GAUTENG Please turn over

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Downloaded from hlayiso.com 2 Physical Science/SG/P1 DBE/2013 SCE TABLE 2: FORMULAE TABEL 2: FORMULES MOTION/BEWEGING 7 1.2 v = u+at s = ut + Dat v? = u? +2as u+V = t s=(%") FORCE/KRAG Fres = ma p = mv _ Smym, =>? F r F At = Ap = mv-mu WORK, ENERGY AND POWERIARBEID, ENERGIE EN DRYWING W = Fs E, = mgh p= W Ex = tmv? t 2 ELECTROSTATICS/ELEKTROSTATIKA w ze KQiQ, (k=9x10°N.m2.c7) |V = — r Q F Sas W = QEs q E= KQ (k=9x10°N.m2.c?) |E = au E d CURRENT ELECTRICITY/STROOMELEKTRISITEIT Q= It emffemk = I(R +r) R=ntmtyt.. as “ue (k=2x 107 NA) 11°11 vt —=—t+—4+—-+4.. = Vit = FRt = — Ron th 5 W = Vit =PRt =) Vv 2 R= — P=vicPR= © Copyright reserved GAUTENG

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Downloaded from hlayiso.com Physical Science/SG/P1 DBE/2013 SCE ANSWER SHEET CENTRE NUMBER: EXAMINATION NUMBER: 441 A B Cc D 1.2 A B Cc D 3 A B Cc D 1.4 A B Cc D 1.5 A B Cc D 1.6 A B Cc D a7 A B Cc D 1.8 A B Cc D 1.9 A B Cc D For the use of the marker Vir die gebruik van die nasiener Marks obtained Punte behaal Marker's initials Uae A 7 c Nasiener se paraaf Marker's 1.14 A B e D number Nasiener 1.15 A B Cc D se nommer (15x3) [45] Copa resend A AY AA A