Physical Sciences Grade 12 P1 NSC June 2013 Question Paper

Downloaded from hlayiso.com basic education Department: Basic Education REPUBLIC OF SOUTH AFRICA SENIOR CERTIFICATE EXAMINATION PHYSICAL SCIENCE P1 PHYSICS HIGHER GRADE 2013 MARKS: 200 PHYSICAL SCIENCE HG: Paper 1 3041E IANA This question paper consists of 14 pages, 2 data sheets and 1 answer sheet. X@5 MIN TIME: 2 hours conyghtresoned a ll

Downloaded from hlayiso.com Physical Science/HG/P1 2 DBE/2013 SCE INSTRUCTIONS AND INFORMATION 1. Write your centre number and examination number in the appropriate spaces on the ANSWER BOOK. 2. Answer ALL the questions. 2 You may use a non-programmable calculator. 4. You may use appropriate mathematical instruments. Data sheets are attached for your use. 6. NOTE: The following circuit diagram symbols are used in this paper: Resistor: +} instead of —VWW4-— Bulb: —«)- instead of —QWWD— 7. You may forfeit marks if you do not follow instructions. QUESTION 1 INSTRUCTIONS AND INFORMATION 1. Answer this question on the attached ANSWER SHEET. Write your centre number and examination number in the appropriate spaces. 2. Various options are given as possible answers to the following questions. Each question has 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. 2 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 ... DOWD Zea ANSWER: A D Conan reseres ANY AAAV NAAN #2524 oe oO

Downloaded from hlayiso.com Physical Science/HG/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 (4) 1.2 A ball is thrown vertically upwards. Which ONE of the following velocity-time graphs best represents the UPWARD motion of the ball? Ignore air resistance. v v v Vv 0 t 0 t 0 t 0 t A B ¢ D (4) 1.3 An astronaut drops a hammer from a height of 1,5 m above the surface of the moon. While it is falling, the acceleration of the hammer is ... A __ independent of the mass of the hammer. B directly proportional to the mass of the hammer. C inversely proportional to the mass of the hammer. D inversely proportional to the product of the mass of the moon and the mass of the hammer. (4) 1.4 Consider the following equation: _ GMM, = F Which ONE of the following statements regarding the above formula is FALSE? Ar represents the distance between the centres of m; and mo. B_ The force F is inversely proportional to r’. 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. (4) Conroe EH 0 Pease tum over

Downloaded from hlayiso.com Physical Science/HG/P1 4 DBE/2013 SCE 1.5 A car and a truck are both moving at the same speed on a straight horizontal road. Both vehicles brake at the same time. The resultant retarding forces applied by the brakes on both vehicles are equal. The car comes to rest in a distance .x, while the truck only stops after a distance of 2x. What is the mass of the truck if the mass of the car is m? A *%m Bom Cc 2m D 4m (4) QUESTIONS 1.6 and 1.7 refer to the following situation: Two identical lead balls, X and Y, are thrown simultaneously with the SAME initial speed u_ from the roof of a building. X is thrown vertically upwards, while Y is thrown vertically downwards. Ignore air friction. u b Si u 1.6 How do the DISPLACEMENTS of the two balls compare when each ball reaches the ground at the bottom of the building? A The displacements will be equal. B_ The displacement of X will be greater in magnitude. C_ The displacement of Y will be greater in magnitude. D The displacements cannot be compared without further information. (4) 1.7 How do the speed and the magnitude of the acceleration of ball X compare with that of ball Y the instant before they reach the ground? SPEED MAGNITUDE OF ACCELERATION A speed X = speed Y acceleration X = acceleration Y B speed X > speed Y acceleration X = acceleration Y Cc speed X < speed Y acceleration X < acceleration Y D speed X < speed Y acceleration X = acceleration Y (4) Copa resered ANI 0 A Peosetum over

Physical Science/HG/P1 5 DBE/2013 SCE 1.8 Which ONE of the following combinations of base units represents change in momentum? A kg.m.s* B kg.m.s" C kg.m2.s? D kg.m?.s® 1.9 A ball with mass _m, moving horizontally in a straight line with a velocity u, strikes a wall and bounces back in the opposite direction with a horizontal Downloaded from hlayiso.com velocity v. Which ONE of the following is the correct change the ball will experience in its (m) — oa) momentum and kinetic energy? wall CHANGE IN MOMENTUM CHANGE IN KINETIC ENERGY A m(u — v) Yam(u? — v2) B m(u + v) Yam(u — v)? c m(v + u) Yam(v? — u?) D m(v — u) Yarn(v — u)? Copyright reserved GAUTENG Please turn over (4) (4)

1.10 Downloaded from hlayiso.com Physical Science/HG/P1 6 SCE DBE/2013 Two oppositely charged parallel metal plates, P and Q, are placed horizontally as shown below. A negative point charge is placed between the plates as shown. P++ttee eee Negative point charge What is the direction of the electric field between the plates and in which direction will the point charge move? DIRECTION OF DIRECTION IN WHICH ELECTRIC FIELD POINT CHARGE MOVES A from Q to P towards P B from Q to P towards Q c from P toQ towards P D from P to Q towards Q (4) 1.11 Two long parallel conductors, KL and MN, carry currents of I and 61 respectively in the directions shown. Conductor MN experiences a force F due to the current in KL. What will be the magnitude and direction of the force which conductor KL experiences? K M I 61 : N MAGNITUDE OF FORCE DIRECTION OF FORCE EXPERIENCED BY KL EXPERIENCED BY KL A F to the right B F to the left c 6F to the right D 6F to the left (4) Copyright reserved Please turn over GAUTENG

1.12 Downloaded from hlayiso.com Physical Science/HG/P1 Z SCE The emf of a battery can best be explained as the ... A rate at which energy is delivered per unit current. rate at which charge is delivered. B Crate at which energy is delivered. D DBE/2013 charge per unit energy delivered by the battery. (4) 1.13 In the circuit below, the battery has negligible internal resistance. i|1} R14 R2 R3 J iS) Nay 7 What will happen to the readings on the ammeter and the voltmeter if switch S is CLOSED? AMMETER READING VOLTMETER READING A increase increase B increase decrease Cc decrease increase D decrease decrease (4) Cony reserved NAN A Paso tum over

Downloaded from hlayiso.com Physical Science/HG/P1 8 DBE/2013 SCE 1.14 The bulbs in the circuit below are identical. Three ammeters, X, Y and Z, are connected as shown. Which relationship for the readings registered by the three ammeters is CORRECT? A B c D X=Y=Z X=3Y X=Y+Z Y=3Z (4) 1.15 Two bulbs, X and Y, are connected in the circuit below. The power in Y is P, while the power in Xis 2P. Which ONE of the following is the CORRECT relationship for the current in X to the current in Y? A B Cc D ly cs 2Ix 2lIy = Ix ly J 4Ix Aly = Ix ) Copter A 0 Pease um over

Downloaded from hlayiso.com Physical Science/HG/P1 9 DBE/2013 SCE ANSWER QUESTIONS 2-9 IN THE ANSWER BOOK. INSTRUCTIONS AND INFORMATION Ue 2. a} 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.) The pilot of a light aircraft takes off from town X and flies directly towards town Y, which is 850 km due west of town X. The aircraft maintains a constant air speed of 200 km.h'. However, a wind blows at 50 km.h FROM the north-west throughout the flight. 2.1 2.2 2.3 Draw a labelled vector diagram (triangle) (not necessarily to scale) which clearly shows the velocity of the wind and the velocity of the aircraft, as well as the aircraft's resultant velocity towards town Y. Also indicate the size of any angle(s) which you know. (No calculations are needed.) Determine by means of a calculation or an accurate construction (scale: 1 cm represents 25 km.h"'): 2.2.1 The direction in which the pilot has to steer the aircraft in order to reach town Y 2.2.2 The resultant velocity of the aircraft — The time the aircraft takes to reach town Y If the wind of 50 km.h" was blowing from the west instead of the north-west, how much LONGER, in hours, would it have taken the aircraft to reach town 7 cooroswoec A 0 0 Pose i (4) (5) (3) (4) (4) [20]

Physical Science/HG/P1 10 DBE/2013 Downloaded from hlayiso.com SCE QUESTION 3 (START ON A NEW PAGE.) The dots on the tape below were made at 0,02 s intervals in an experiment during which the tape, linked to a trolley, was pulled through a ticker-timer. The distances between dots, as given on the sketch, are in mm. AB ¢ D E F G H -6-8. 10+. 12 - 14 . 16 . 18 . Calculate: 3.1 The magnitude of the instantaneous velocity (in m.s’') of the trolley at B 7 The magnitude of the instantaneous velocity (in m.s”) of the trolley at G 3.3 The magnitude of the acceleration of the trolley QUESTION 4 (START ON A NEW PAGE.) The horizontal roof of a gymnasium is fitted with a horizontal glass (sky light).A player throws a ball of mass 0,5 kg vertically upwards at 10 m.s”'. The ball leaves the player's hand vertically at a distance of 1,8 m below the glass sheet. The ball breaks the glass sheet and carries on moving vertically upwards. It reaches the highest point of its motion 0,7 s after leaving the player's hand. Air friction should be ignored. 4.1 4.2 4.3 44 4.5 4.6 comotenoes NL 0 Pen ten horizontal glass sheet 1,8m 0,5 kg é Show by calculation that the speed with which the ball hits the glass sheet is 8m.s". Show by calculation that the speed of the ball immediately after breaking the glass sheet is 5 m.s™. Calculate the magnitude and direction of the change in the ball's momentum (the impulse) when it breaks the glass sheet. What is the magnitude and direction of the impulse which the ball exerts on the glass sheet when the ball hits it? Calculate the work done by the window to slow down the ball. Was the mechanical energy of the ball conserved during its upward movement? Briefly explain your answer. (4) (3) (5) [12] (4) (7) (4) (2) (5) (3) [25]

Downloaded from hlayiso.com Physical Science/HG/P1 ue DBE/2013 SCE QUESTION 5 (START ON A NEW PAGE) A car of mass 1 000 kg pulls a trailer of mass 500 kg along a straight horizontal road. The car's engine causes a forward force of 3 800 N to be exerted on it. Friction between the car's tyres and the road is 500 N, and the friction between the trailer's tyres and the road is 300 N. car trailer (500 kay > 1 000 kg 3800 N 5.1 Draw separate labelled force diagrams for the car and trailer, and indicate and label ALL the horizontal forces acting on each. 5.2 Calculate the magnitude of the acceleration of the car-and-trailer combination. 5.3 The trailer now becomes unhooked from the car. 5.4 Describe the motion of the trailer after it became unhooked. (Assume that it travels in a straight line.) 5.5 Will the magnitude of the car's acceleration REMAIN CONSTANT, INCREASE or DECREASE after the trailer has become unhooked? Briefly explain your answer. QUESTION 6 (START ON A NEW PAGE.) A boy of mass 50 kg stands on a bathroom scale which is placed on the floor of a lift. The scale is calibrated in Newton. 6.1 What is the reading on the scale if lift is standing still? 6.2 Calculate the reading on the scale ile the lift accelerates upwards at 2m.s”. 6.3 would beif Conroe NAN 0 0 Pesetum vr (5) (5) (4) (2) (3) [19] (2) (1) HA)

Downloaded from hlayiso.com Physical Science/HG/P1 12 DBE/2013 SCE QUESTION 7 (START ON A NEW PAGE.) Two trolleys, A and B, are moving to the left on a frictionless horizontal surface at 2 m.s" as shown in the sketch below. Trolley A, fitted with a spring, has a mass of 1 kg. Trolley B, of mass 2 kg, is connected to trolley A by means of the spring attached to trolley A. The spring is compressed. (Ignore the mass of the spring). 2ms" «<—___ Alt kg 2kg_|B The compressed spring between the trolleys is released and trolley A then moves to the left at 8 m.s™. 7.1 Calculate the magnitude and direction of the velocity of trolley B immediately after the spring was released. (6) 7.2 NAME and STATE in words the law which you applied in QUESTION 7.1. (4) ue Explain why kinetic energy is not conserved during an event like this. (2) [12] QUESTION 8 (START ON A NEW PAGE.) A polystyrene ball, X, which is covered with graphite, is positively charged and placed in a gas cylinder. The mass of the ball is 10 g. An identical ball, Y, of mass 10 g, which is neutral, is now dropped in the gas cylinder. Y makes contact with X and is then repelled upward by X. Y comes to rest when the vertical distance between the centres of the two balls is 3 cm, as shown in the sketch below. Assume that no charges are transferred between the cylinder and the spheres. 3cm Ol! 8.1 State, in words, Coulomb's law. (3) 8.2 Draw the resultant electric field pattern due to the charges on X and Y. (4) 8.3 What is the magnitude of Y's weight? (2) Copritresoved ANA Pease tn ove

Downloaded from hlayiso.com Physical Science/HG/P1 13 DBE/2013 SCE 8.4 Prove that the ORIGINAL charge on X was 2 x 10°’ C. 8.5 Suppose Y was originally not neutral, but had a charge of -1 x 10°” C. X still has a charge of 2x 107 C. 8.5.1 Calculate the new charge on each sphere after they have separated again. 8.5.2 | Why would Y still have been repelled from X after they have touched? 8.5.3. Would X and Y be CLOSER or FURTHER APART? Explain briefly. QUESTION 9 (START ON A NEW PAGE.) Consider the circuit diagram below. The ammeter reads 3 A, while the battery has an emf of 24 V and an internal resistance r. (3) ad ie 6Q iS} e—e 12Q @) Switch S is closed. Calculate: 9.1 The effective resistance of the parallel combination of resistors 9.2 The reading on voltmeter V; 9.3 The internal resistance of the battery 9.4 The reading on voltmeter V2 Cop esoned NAN 0 Peas tum ovr (5) (2) (2) (3) [21] (4) (4) (4) (4)

Downloaded from hlayiso.com Physical Science/HG/P1 14 SCE 9.5 Switch S is now opened. DBE/2013 Without any further calculations, predict whether the readings on each of the following will INCREASE, DECREASE or REMAIN UNCHANGED. Give a reason for your answer in each case. 9.5.1 The reading on ammeter A 9.5.2 The reading on voltmeter V; 9.5.3 The reading on voltmeter V2 Copyright reserved GAUTENG TOTAL: (2) (3) (3) [24] 200

Downloaded from hlayiso.com Physical Science/HG/P1 1 DBE/2013 SCE DATA FOR PHYSICAL SCIENCE PAPER | (PHYSICS) 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 g - Swaartekragversnelling 10 ms Gravitational constant G on oo Swaartekragkonstante 6,7 x 107" N.m*.kg Charge on electron - Lading van elektron e -1,6x10°°C MATHEMATICAL AIDS/WISKUNDIGE HULPMIDDELS B A Cc sinA _ sinB : sinc a b c c? = a? + b* — 2abcosC Cont rosene A YA

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Downloaded from hlayiso.com Physical Science/HG/P1 TABLE 2: FORMULAE TABEL 2: FORMULES MOTION/BEWEGING 2 SCE DBE/2013 v =u+at s = ut + tat? 2 v2 = u? +2as ut+vV 2 FORCE/KRAG Fres = ma p= mv Gm m: F=—t2 F At = Ap = mv-mu r2 WORK, ENERGY AND POWER/ARBEID, ENERGIE EN DRYWING W = Fs E, = mgh p= W Ex = mv? t 2 ELECTROSTATICS/ELEKTROSTATIKA w F KQiQe (k=9x10°N.m2.C?) |V = OQ if F 3a = W = QEs q E= KQ (k=9x10°N.m2.C?) |E = w ii d CURRENT ELECTRICITY/STROOMELEKTRISITEIT Q= It emflemk = I(R +r) R= nmttrmti(yt... 2a eae (k= 2x10" NA?) 1 2 a 7 vt = +++ = Vit =PRt = — Berea W = Vit =IfRt = Vv 2 R=— P=VicPR = | R Copyright reserved GAUTENG

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Downloaded from hlayiso.com Physical Science/HG/P1 DBE/2013 SCE ANSWER SHEET CENTRE NUMBER: Sas EXAMINATION NUMBER: | | | | | | | | | | | | 14 A B Cc D 12 A B Cc D 13 A B Cc D 14 A B Cc D 15 A B Cc D 16 A B Cc D 17 A B Cc D 18 A B Cc D 19 A B Cc D A B Cc D For the use of the marker ee Vir die gebruik van die nasiener 1.11 A B Cc D Marks obtained Punte behaal 1.12 A B c D Marker's Naslener 1.13 A B Cc D ne paar 1.14 2 . c Z apenas 115 [AJPTBYLo PTS (15 x 4) [60] Cony ese NE 0 A